Every maps and campaigns, no matter the game versions, can be playable on Reforged since they are backwards compatible. However you will need to make sure that map/campaign doesn't use some kind of protection/memhacks that makes it unplayable on higher patches.
The most obvious reason when you attempt to play older maps/campaigns on Reforged was the Return Bug, which makes them unplayable on 1.24b+ due to the inclusion of JASS hash tables.