Looking at the option chain I could not find a hedged way to do it (which does not mean there isn't one...). IVs are so high that credit spreads don't bring in enough.
If you are willing to go naked, selling TLRY July or January 2022 calls, and buying APHA (at the merger ratio) from the proceeds should work. Select the short call strike so your net cost is 0. If you can stand the possible short squeeze in terms of your margin...
I might put on a paper trade. Too risky to do with enough money to move the needle in real life.