I wear my AirPods Pro also when I do lawn work but not because I need the hearing protection. It's because I'm listening to podcasts. My lawn mower, leaf blower, and weed wacker are all electric corded, so they are relatively quiet.
I do find it quite interesting that whenever someone brings up the use of APP during garden work (like I did in another post), one of the first remarks is how APP because of ANC is not adequate hearing protection. Well, I'm not using them for hearing protection, but thank you for the notice 🙂
If I really needed hearing protection, I would first go with ear plugs which provides WAY better sound protection than consumer noise cancelling headphones. Next level would be adding ear muffs over ears that are already plugged with ear plugs.