Parkrun/Marathons?

Anyone ever completed a marathon or attended any form of races/runs in their day chairs?

I became disabled early last year following an injury to my ankle and awaiting amputation. Curious to see if anyone here attends anything such as the parkruns? Or even competed a marathon! Something I'd love to do in my chair!

Wondering how people find it in their day chair/what times they get - really hard to find a sort of average I suppose on wheelchair times for anything that aren't racing chairs!

I have a quickie nitrum currently (which I was lucky enough to get after fundraising for it!).