This is a pre-packaged instance. It is 1.20.1 with fabric, and everything already set up. Import by clicking add instance -> import -> select the zip file
Curseforge modpack Simmilar to the last one, import through curseforge or your mc launhcer (not the official launcher though)
Modrinth modpack Simmilar to the last one, import through modrinth or your mc launhcer (not the official launcher though)
Manual install Instructions are included in the zip file. just extract the zip and go from there.