I have a 2TR-FE that originally required 5W-30 when it was released but was back-spec’d to 0W-20. I thought it sounded kind of clattery on 0W-20 so I tried a fill of 5W-30 and it is slightly – but noticeably – smoother and quieter at high RPM.
The Camry can use up to 10W-30. You gotta remember that a lot of Camrys and Corollas end up in places where high-end synthetic oil is hard to find or cost prohibitive. These aren’t German prima donnas that can only survive on a single oil spec.
Australian Camry Hybrid Owners Manual screenshots:
https://i.imgur.com/ujDCTT1.png
https://i.imgur.com/BdrGmz0.png
https://i.imgur.com/KEKVZKg.png
Keep in mind that in non-US markets it will be available with the 2TR-FE (2.7L Tacoma 4-cylinder) and the 1GD-FTV turbodiesel - both pretty simple for emerging markets.
Scroll down to see where the various engines will be offered:
https://global.toyota/en/newsroom/toyota/39526684.html