Its not really worth weighing a bike, go on feel, does it feel light and nimble? then it’s probably fine, be content…
Spending Several hundred quid more to shave another pound or two off of your bike? don’t do it!
Surely the best use of your time and money is removing at the same or indeed greater mass form the user through exercise and pie rationing?*
*not that I’ve done that…
Alternatively go 1×10 1×5 1×3, buy the lightest rigid forks you can find, Drill holes on your crank arms, cut the post down tear the padding off the saddle and sit on the bare plastic carcass (Drilled of course), trim the bars down to 327mm wide, use foam grips remove the grips, drll more holes in anything you can and fit the thinnest walled, lightest, 1.5″ tyres you can find (Slicks maybe?).
It’ll be horrific to ride and possibly kill you, but the car park bragging rights for having a sub 22lb bike will be off the scale on the wankometer… and that’s what really counts.