Re-getting Delta Muk?

Hi everyone,
Currently, I am working to battle Audrey in the Abyssal cult base and am looking to find the best Pokémon for it.
I have been reading about it an have found that the Delta Muk is great for this, as well as a good Pokémon in general.
I accidentally missed getting this during the second mission of the broadcast tower - I didn’t think it was special at the time.
It there any way (other than trading) which I can find this Pokémon at this point in the game after not getting it earlier?

there is no other way than trading after u miss it in the broadcast tower