Yes, you can upgrade your HP Pavilion 15-p002la to a 5 GHz Wi-Fi adapter. The current Realtek RTL8723BE adapter only supports 2.4 GHz, but you can replace it with a dual-band adapter that supports both 2.4 GHz and 5 GHz. A compatible option would be the Intel Dual Band Wireless-AC 7260 or similar. Just make sure to check your laptop’s service manual for any specific requirements or restrictions, such as a whitelist of compatible Wi-Fi cards, before purchasing the new adapter.