Computer Help and Support

Apple users (mac and iphone/ipad) can use ScreenTime
https://www.businessinsider.com/guides/tech/how-to-block-websites-on-mac-safari?op=1
https://www.howtogeek.com/393460/how-to-block-a-website-in-safari-on-iphone-and-ipad/


On a per-browser basis Firefox/Opera/chrome suggest using "Block Site" (not sure if this the same for each or just the same or similar name)
https://www.technipages.com/block-websites-chrome-opera-edge-firefox/

Or you can just knock the site out of DNS for your entire home network with a pi-hole.
That used to be specific to a raspberry-pi computer but now will run on most linux distros (on a VM? I didn't dig that far).
https://docs.pi-hole.net
requirements (like 2 or 4 GB space and 512MB ram)
https://docs.pi-hole.net/main/prerequisites/

Or perhaps use the built-in firewall in Windows and Mac.
https://www.highspeedinternet.com/resources/how-to-enable-disable-firewall-windows-mac