I can't speak to
Navionics in particular, but I've found very few iOS apps have been optimized for the M1 Mac at this point. Most of the apps I've tried will load and run, but are glitchy to some degree.
I expect this to improve soon, because the M1, M2... chip series have already been built into the Pro series iPads, and will trickle down to the rest of the line and the
iPhone in their forthcoming generations.