I don’t really understand your question. Doesn’t you bike already have self cancelling indicators? My RP does.
It's a 2023 Bonneville T120 and it does not. As I recall the 2023 Speedmaster I test rode did not either.
Traveler There are several out there all pretty much the same quality. Ask triumph they may have a unit especially for your bike. Joe
Might be worth a look: https://www.bennetts.co.uk/bikesoci...gy/st2-turn-system-self-cancelling-indicators