Hi, thanks for the A2A.

You don’t need to use use a child theme for Twenty Twenty-Two just like you don’t need to use a child theme generally. However, you can use a child theme if you want, something I talk about on Pantheon’s Bolts N’ Bytes podcast this week.

Update: I also talk about the more technical details if you did want to create a child theme, in a blog post that was just published today.