Screentime and Downloading free apps without a password

I have screen time on my teen's phone to control just a few things. I would like her to be able to download free apps without having to enter her appleID password (which she doesn't know). I have enabled "approve purchases" for her downloads. I have disabled "require a password" for in-app purchases on Screentime. I've temporarily turned off screen time and/or set it to allow account changes, so that she can go into Settings (Media & Purchases, Password Settings) on her phone and toggle off "Require Password" for free downloads. As soon as I enable screen time so that she can't make Account Changes, the Media & Purchases, Password Settings automatically toggles back to "require password" and is muted so that she can't change it. Any thoughts on how to fix this? All I want to do it "approve purchases" but I'm not willing to turn off Screentime permanently.