My dc9 didn't have tablet until 5 years old and this was a decision spurred on by us due to the pandemic.
We got an amazon kids tablet which we've found great for parental controls and available content. It doesn't have YouTube and we switched off Internet browsing. It can be aged up in parental controls so we've did that but it's basically the same but includes trickier games.
We have a few families who we've slowly stopped visiting/grew apart due to screen use. One as soon as we go in house huge 70 inch TV has YouTube put on with youtubers, then playing games on tablet at same time, or on phone with tiktok whilst we're sitting there left in the real world, so we ended up stopping going.
The last time was a couple of years back and it was a beautiful summers day, we'd driven 30 minutes to their house only to arrive at 1pm to find both kids still in their pj's and wanting to do dual screens and not come out into garden, so me and dc sat out in the sun ourselves amdd left after about an hour to go to a park on our own...Im like what is the point. Their kids also given phones with unrestricted access from about age 7.
Another family was a bit similar to us and kids had a great time playing together but gave a phone when their dc age 7 and we've slowly stopped going as my dc asks to play when we visit, they have big garden but it's a no. My dc asked about Netflix shows/fab characters, books, switch games but kid seemed to have no knowledge about that stuff as only has a phone, by last time we went the kid was just sitting on tiktok scrolling one video after another. Seems to be unrestricted access aswell. My dc has found this one sad and used to say why don't they want to play with me etc, they used to be fun etc.
My personal opinion is that YouTube and ticktok is absolute mind rot, there is like zero benefit in my opinion, it's not like a show that's been rated a U or PG and there's no character development like following a show where there's a hero/villains.
Dh and I don't use YouTube much and neither of us have ever had tiktok (were not old either, in our 30's), we only really put things like new movie trailers on YouTube on the living room TV together and tend to just watch Netflix/amazon.
Netflix with parental controls has some great shows and has turned a lot of books into shows now too.
We do actually allow gaming on switch/playstation, again with heavy parental controls, including fortnite/roblox as chat with friends over headset which I don't mind, I know it's locked down and am very present when gaming happening and know the kids/parents who are friends.
We do have a family chrome book with a child profile on there, it does have YouTube kids app and is used maybe once a month to do a drawing tutorial, otherwise not used much.
My dc read 80 age appropriate books in 2023, watched numerous Netflix TV shows and has favourite shows like to rewatch. I host a lot of playdates and take friends out and about and my dc now has no interest in playing with kids who want to scroll on a phone or adult profile tablet as zero in common.
There are still families/kids who are like us and haven't found it an issue, we've just moved on from the ones whose kids only interest is scrolling on YouTube or tiktok.
I also know a kid who had a tablet with YouTube from age 2 and kid picked up an American twang to their accent and we live in Scotland. Saying that I actually know another one who has a weird twang to their accent when all the adults/families involved speak thick scots or Glasweigian. I can only assume all the youtubers have been absorbed into their developing brain for speech. Crazy!
My dc has good imagination, attends a few clubs has friends in and out of school who I have for playdates.
Has fairly unrestricted "screen time" when we are at home which I don't mind as it's all parental controls/appropriate content and everyone needs some down time!
Still does crafts and board games so leave it up to them what they want to do in their free time as they are coming up to 10 years old now and I don't want to be breathing down their neck.