I'm starting to look at this transition from the other end. On my M1 Mac mini, used as a full-time server, I am down to just 8 apps that remain native to Intel:
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Out of those remaining 8 I know work is nearing completion for AdGuard for Safari and CleanMyMac; Plex will take a good while longer, whilst Synology and UniFi have not even replied regarding any effort to transition to Apple Silicon. No idea about the final 3 (Tag Editor, PingPlotter & Harmony Bridge) and only Harmony Bridge is a must-have app for my SOHO network.
I never expected to be down to a small handful of Intel-only apps so soon into the transition.