Checking eBay sounds like a good first step. In fact, having two (both were given by my kids for birthdays) is part of the reason why I've not been flying much - different apps, different remotes, aside from different features/settings, etc.
Would appreciate some suggestions. I have a Mavic 2 Zoom (with "Fly More") and a mini. I've found a mini to be a perfect size for me, mainly for travel but also good for "backyard", so now a Mini 3 Pro would be a better choice to replace both M2Z and mini. Where should I try to sell the Zoom...