They’ve retracted the comment.
“The premiere date for Star Trek: Strange New Worlds S3 was given to one of our members in error and is incorrect. Apologies for the inconvenience caused. We share your excitement and can’t wait for the 3rd season of Star Trek: Strange New Worlds to premiere.”
Though it could still be accurate and they’re just doing damage control. Maybe we’ll find out for First Contact Day?
Not only do you not need to catch up with Disco, but the end of season 2 of Disco doesn’t dovetail to the beginning of Strange New Worlds super-well when you watch them back-to-back; if anything, they feel like they lightly contradict each other.
Though if I were to recommend a single episode it would be “Through the Valley of Shadows” from season 2, which is probably the only “important” episode as far as Strange New Worlds goes, though the key stuff gets recapped in SNW.
The Short Treks episode Q&A gets some references in the series too, though if you don’t watch it you likely won’t realize you missed anything.
Not sure your country of origin, but in the U.S. it has all 13 theatrical films + Section 31, as well as Woman in Motion and Building Star Trek.
https://www.paramountplus.com/collections/star-trek/