It appears right now that none of the reviewers are allowed to move PS5 games to external storage drives. Might be by design or could be fixed in release day firmware. I am not worrying... yet.
https://press-start.com.au/news/pla...t-support-external-hard-drives-for-ps5-games/
Surprising but also not a huge issue immediately when there aren't that many games to have to juggle. Perhaps they'll enable that feature at the same time that they enable the M.2 port. I'll be keeping all my PS4 games on a USB SSD anyway.