Tutorial: How to Upgrade the SSD and RAM of the ASUS ROG Zephyrus G14 - YouTube
How to upgrade the RAM and SSD of your ROG Strix laptop | ROG - Republic of Gamers Global
ASUS ROG Ally 1TB SSD version possible and SSD replaceable, 16GB LPDDR5x-7500 also possible but GeekBench points to LPDDR5-6400 : r/GamingLeaksAndRumours