My only issue with Material-anything is it immediately looks/feels to me like something Google-related.

Not a deal-breaker entirely, but for my own things I like differentiate.

I see your point and like to do things myself, just so they're mine, but I feel like there's only so many ways to skin a cat and draw a plus symbol.

Most users will not care if they have seen a map icon in another app before anyway.

If you use rounded or outline variants it's a bit different at least. There's also the two-tone variant which at least I haven't seen used much