But there's no way to manually save... is there?

I've already played both TP1 and TP2 and all the DLCs but realized I missed the whole somnodrome thread because I ignored Doge. I'm playing through TP2 again and using this site as someone of a response guide to get me to the right place this time.

One of the instructions says "Once completed, you will do a backup save right in front of the aforementioned Lost Lab to save some time (walk inside to trigger the checkpoint). Choose to save before entering the Somnodrome."

https://psnprofiles.com/trophy/24413-the-talos-principle-ii/51-a-new-morality

I'm on a PS5 and I have no way to manually save. And unlike TP1 I can't find any way to load a particular autosave. I've checked the menus and options and don't find anywhere to do that. Can someone tell me if I'm missing something? I there a way to get back to that point in the game?