Very short version -
We got him a tablet for Christmas when he was around two years and eight months old. Use of that was intermittent and with a parent - cbeebies apps like DipDap, mostly at least vaguely educational stuff. We'd also use it on long car journeys, DH's parents live 4-5 hours away so it would tend to be on visits to them, DS was very, very active, always wanted to be moving so a car journey that long, even with breaks was difficult.
But overall he would play on it a lot for a week then not touch it again for ages. He was massively into Thomas at the time so most screen time was watching Thomas on the tv and recreating bits with the toys (and lining up all the toy trains). When he moved on from Thomas he was into Lego Ninjago, so similar, would watch the tv show and play with the Lego. DS, DH and I would play the Lego videogames together on co-op. He was still very active and spent a lot of time out doors and in playgrounds.
That probably takes us up to reception age/year 1.
Developed an interest in retro gaming, mainly Nintendo and Mario.
Year 4 is when things went downhill, stopped being able to cope with school, pretty much didn't go for a year, went through a patch of regular violent meltdowns, as in multiple times a day. This reduced as pressure to attend school eased off and alternative provision was looked for. DS started to want to go out less - really didn't want to see or be seen by children from his school.
Really got into Minecraft, screen time went up. I think he was using it to regulate as he found the meltdowns and hurting us distressing. It proved to be a useful hook to get him back into school in a small unit for children with additional needs within a mainstream school, though he is very scathing of Education Edition! At this point his special interest was redstone in Minecraft - building machines in game essentially, which at least has some educational value in problem solving and design.
Now has a diagnosis or ASD, in a specialist Autism Base, mostly attends. At home he spends too much time playing Minecraft and Geometry Dash, but it seems to keep him regulated and able to mostly attend school. I get him out of the house when I can persuade him to come out with me on weekends. He has no local friends which makes things difficult for socialising with his peers, and wouldn't be able to use public transport on his own.