If true, this seems like a serious problem for something that's supposed to stop circumvention. Uninstalling an app is trivial on iOS, even easier than unlocking Screen Time.
If not - e.g. if you have to scan the barcode / QR code to uninstall the app (a block that I don't think Apple would allow) - then presumably you'd need to reinstall iOS from scratch.
If not - e.g. if you have to scan the barcode / QR code to uninstall the app (a block that I don't think Apple would allow) - then presumably you'd need to reinstall iOS from scratch.