How to restrict #images in iMessage?

[joej2]

It used to be that #images could be restricted in Messages if Restrictions were enabled in Preferences and "installing apps" turned off as in these steps:

Turn on parental controls for #images and other iMessage apps
To control access to #images and other iMessage apps, you can remove the apps from your app drawer and turn on Restrictions for downloading iMessage apps.

To remove an app from your app drawer:

1. Open Messages, tap
   
   , and enter a contact or tap on an existing conversation.
2. Tap
   
   , then tap
   
   in the lower-left corner.
3. Swipe left over the app, then tap Delete.

To turn on Restrictions for iMessage apps:

1. Go to Settings > General > Restrictions.
2. Tap Enable Restrictions.
3. Create a Restrictions passcode. You need your Restrictions passcode to change your settings or to turn off Restrictions.
4. Turn off Installing Apps.

https://support.apple.com/en-us/HT207179

But, now this does not work. Does anyone know how to restrict #images in iMessage currently?

Thanks!