It's a native iOS app so I would have to start from scratch on Android. I do plan to port it to macOS via Catalyst sometime after the upcoming WWDC which will help some Android users.
I'll note that this is a big pain point for me: although Android users don't pay as much for apps, they help boost word-of-mouth marketing substantially. I see some similar but (tbh) subpar apps get more word-of-mouth online even in recommendations to iOS users just because of the huge signal boost from Android users.