how to fix google play services error samsung | samsung google play services not working

Samsung S3
Samsung Galaxy Y
Samsung Duos
Hard Reset, Clear Cache, Clear Data, Reset, Restart Phone. I've done all that. but it still doesn't want to update "GOOGLE PLAY SERVICES" "ERROR, NO CONNECTION" even if it's data or wifi .. it shows "NO RESULTS FOUND" when you open "PLAY STORE" no applications come up even if you search . PLEASE HELP. for children to use, THANK YOU 🙏

I got a galaxy s10 for some reason Google play services is being blocked by my device which is preventing me from installing & using apps supported it
What is the reason ​& how do I fix this
What's in the video didn't work