[2020] Is there a way to have it so the owner and admins of a server have cheats(summoning vehicles and stuff) while normal players don’t? I have a server rn and I have just left it on cheats enabled and prayed that no one notices.

Only admins/owner can uss cheats, unless you're including LDM permissions. Cheats Enabled on applies to admin toolkit, fullstop; normal users cannot use cheats.