Created Drowned (keeping a zombie under water until they convert) do not equip tridents. They'll equip fishing poles as evidenced by my farm chest getting fishing poles, but no Tridents. I am killing the Drowned with a Sword with Max Looting, and not getting any tridents at all.
Linked issues
Comments 2
Thank you for your report!
We're tracking this issue as MCPE-79226, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
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This is working as intended. Zombies converted into a drowned never spawn with tridents when converted.