Hello 4444Kwh,
Thank you for reaching out to Apple Support Communities.
If you prevent your child from being able to delete the app, this should solve the problem.
"Prevent iTunes & App Store purchases
You can also prevent your child from being able to install or delete apps, make in-app purchases, and more. To prevent iTunes & App Store purchases or downloads:
- Go to Settings and tap Screen Time.
- Tap Content & Privacy Restrictions. If asked, enter your passcode.
- Tap iTunes & App Store Purchases.
- Choose a setting and set to Don't Allow.
You can also change your password settings for additional purchases from the iTunes & App Store or Book Store. Follow steps 1-3, then choose Always Require or Don't Require."
More details can be found here: Use parental controls on your child's iPhone, iPad, and iPod touch
Your can also leave feedback for Apple directly by going to iPhone
Good Luck !