diff --git a/drivers/lora/loramac_node/sx126x.c b/drivers/lora/loramac_node/sx126x.c
index e37e8ceef6568..4b869ab8ecdd6 100644
--- a/drivers/lora/loramac_node/sx126x.c
+++ b/drivers/lora/loramac_node/sx126x.c
@@ -290,13 +290,6 @@ RadioOperatingModes_t SX126xGetOperatingMode(void)
 	return dev_data.mode;
 }
 
-#if HAVE_GPIO_FE_CTRL
-static const enum {
-	RFO_LP,
-	RFO_HP,
-} pa_output = DT_INST_STRING_UPPER_TOKEN(0, power_amplifier_output);
-#endif
-
 #define LORA_NODE DT_NODELABEL(lora)
 
 
@@ -324,7 +317,7 @@ void SX126xSetOperatingMode(RadioOperatingModes_t mode)
 		sx126x_set_tx_enable(1);
 #endif
 #if HAVE_GPIO_FE_CTRL
-		if (pa_output == RFO_LP) {
+		if (sx126x_get_tx_power_mode() == RFO_LP) {
 			sx126x_set_fe_ctrl(txlp_fe_ctrl_lines[0], txlp_fe_ctrl_lines[1], txlp_fe_ctrl_lines[2]);
 		} else {
 			sx126x_set_fe_ctrl(txhp_fe_ctrl_lines[0], txhp_fe_ctrl_lines[1], txhp_fe_ctrl_lines[2]);
diff --git a/drivers/lora/loramac_node/sx126x_common.h b/drivers/lora/loramac_node/sx126x_common.h
index 8dbe8af620f04..d64d51a4a50cc 100644
--- a/drivers/lora/loramac_node/sx126x_common.h
+++ b/drivers/lora/loramac_node/sx126x_common.h
@@ -35,6 +35,7 @@
 #define HAVE_GPIO_TX_ENABLE	DT_INST_NODE_HAS_PROP(0, tx_enable_gpios)
 #define HAVE_GPIO_RX_ENABLE	DT_INST_NODE_HAS_PROP(0, rx_enable_gpios)
 #define HAVE_GPIO_FE_CTRL  (DT_INST_NODE_HAS_PROP(0, fe_ctrl1_enable_gpios) && !DT_INST_NODE_HAS_PROP(0, tx_enable_gpios))
+#define HAVE_PA_OUTPUT_LOCKED DT_INST_NODE_HAS_PROP(0, power_amplifier_output)
 
 struct sx126x_config {
 	struct spi_dt_spec bus;
@@ -74,6 +75,13 @@ void sx126x_dio1_irq_disable(struct sx126x_data *dev_data);
 
 void sx126x_set_tx_params(int8_t power, RadioRampTimes_t ramp_time);
 
+enum sx126x_pa_output {
+	RFO_LP,
+	RFO_HP,
+};
+
+enum sx126x_pa_output sx126x_get_tx_power_mode(void);
+
 int sx126x_variant_init(const struct device *dev);
 
 #endif /* ZEPHYR_DRIVERS_SX126X_COMMON_H_ */
diff --git a/drivers/lora/loramac_node/sx126x_stm32wl.c b/drivers/lora/loramac_node/sx126x_stm32wl.c
index c6a484ab34f69..24c740f97a726 100644
--- a/drivers/lora/loramac_node/sx126x_stm32wl.c
+++ b/drivers/lora/loramac_node/sx126x_stm32wl.c
@@ -16,10 +16,14 @@
 #include <zephyr/irq.h>
 LOG_MODULE_DECLARE(sx126x, CONFIG_LORA_LOG_LEVEL);
 
-static const enum {
-	RFO_LP,
-	RFO_HP,
-} pa_output = DT_INST_STRING_UPPER_TOKEN(0, power_amplifier_output);
+#if HAVE_PA_OUTPUT_LOCKED
+static enum sx126x_pa_output pa_output =
+	DT_INST_STRING_UPPER_TOKEN(0, power_amplifier_output);
+static const bool pa_output_locked = true;
+#else
+static enum sx126x_pa_output pa_output = RFO_LP;
+static const bool pa_output_locked = false;
+#endif
 
 void sx126x_reset(struct sx126x_data *dev_data)
 {
@@ -53,6 +57,18 @@ void sx126x_dio1_irq_disable(struct sx126x_data *dev_data)
 void sx126x_set_tx_params(int8_t power, RadioRampTimes_t ramp_time)
 {
 	uint8_t buf[2];
+	const int8_t lp_max = DT_INST_PROP(0, rfo_lp_max_power);
+
+	if (!pa_output_locked) {
+		/* Auto-select PA output based on requested power level */
+		if (power > lp_max) {
+			pa_output = RFO_HP;
+		} else {
+			pa_output = RFO_LP;
+		}
+	}
+
+	LOG_DBG("tx_params PA mode: %s", pa_output == RFO_LP ? "RFO_LP" : "RFO_HP");
 
 	if (pa_output == RFO_LP) {
 		const int8_t max_power = DT_INST_PROP(0, rfo_lp_max_power);
@@ -110,6 +126,8 @@ void sx126x_set_tx_params(int8_t power, RadioRampTimes_t ramp_time)
 		SX126xWriteRegister(REG_OCP, 0x38);
 	}
 
+	LOG_DBG("tx_params final: reg_power=%d ramp=%u", power, ramp_time);
+
 	buf[0] = power;
 	buf[1] = (uint8_t)ramp_time;
 	SX126xWriteCommand(RADIO_SET_TXPARAMS, buf, 2);
@@ -123,6 +141,11 @@ static void radio_isr(const struct device *dev)
 	k_work_submit(&dev_data->dio1_irq_work);
 }
 
+enum sx126x_pa_output sx126x_get_tx_power_mode(void)
+{
+	return pa_output;
+}
+
 int sx126x_variant_init(const struct device *dev)
 {
 	IRQ_CONNECT(DT_INST_IRQN(0),
diff --git a/dts/bindings/lora/st,stm32wl-subghz-radio.yaml b/dts/bindings/lora/st,stm32wl-subghz-radio.yaml
index 1eaa264cf2882..c68c4ddc08ecb 100644
--- a/dts/bindings/lora/st,stm32wl-subghz-radio.yaml
+++ b/dts/bindings/lora/st,stm32wl-subghz-radio.yaml
@@ -15,7 +15,6 @@ properties:
 
   power-amplifier-output:
     type: string
-    required: true
     description: |
       Selects between the low- and high-power power amplifier output pin.
     enum: