Wore a 3M mask N95 both in UK and in Thailand since start of covid...never got any noticeable covid till late 2022 and believe me, anything going, any season before all this masking I got it and bad...no such luck as asymptomatic...I get felled with any respitory bug going around.
Dumped masks arriving back in UK 6 months ago and have had two awful 2 weeks+ covid bouts...this after 3x vax doses over 1.5 years...the effect of covid was still super rough.
I won't be going back to masking though, after being vaxxed and getting it.
Based on my history of picking up respitory illnesses and zero covid symptoms till I stopped the masking, for me anyway masking seemed to definetly work.
I would though maybe wear an N95 on a motorbike in future just to block a bit of the airbourne pollution. So don't assume masking on motorbikes is about covid as people masked up for pollution before, though perhaps not in the numbers we saw after covid.