I want to buy pro subscription but I’m confused my sketchup2020 is accept this por subscription licence
What do you mean by “is accept”. Every version of sketchup runs separately. You can have sketchup 2020 and 2026 installed without any issue, the difference is that licenses aren’t perpetual anymore, you must pay every year to be able to keep using sketchup. I guess you have a perpetual license for sketchup 2020, actually 2021 was the last version that was sold with a perpetual license, if you decide you don’t want to renew your license you can still keep using sketchup 2020.