There is no more dev mode it’s been blacklisted and people are finding that outbtw, I bought lost odyssey and blue dragon digitally on the series x, since I didn't want to swap discs. cost me like $11 with gold as they have discounts, lots of them.
I must say I'm more impressed by the series x than the ps5: bc for four systems, though not full bc, themes, dev mode, dev lab to create custom controllers for the same price as a regular ps5 controller, etc. plus, it boots up instantly unlike the ps5 which has a delay of a few seconds.