Please provide further information.
You can’t just expect us to make an ‘admin’.
If you wan’t admin on this forum, that will not be possible at this time.
Message the moderators for any concerns.
If you would like to make an admin in game, you could create an area where the host/admin spawns.
Life cycle —> item granter -----> grant item
Or make a specific player that joins admin, you can use the image that CraftMasterPlays has posted above.
Use this guide, the pictures are gone, but you should be able to understand using the words/instructions.