Not sure about Google but Apple has per-app time limits, per-app type time limits, overall screen time limits, time of day limits, parental review before app install, parental review before purchases can be made, etc. I've found it to be quite robust in managing my kids' access to the internet.
I’m continually impressed by my 12 year old son’s ability to get around those restrictions. He recently got around his time limit with Brawl Stars by having his friends sending him Brawl Stars view links via WhatsApp. This opens links using Safari’s underlying engine (SFSafariViewController), which does not get considered by the safari app time block.
