in an attempt to correct many weak analogies...

russia has historically been willing to suffer asymmetric losses in the 2X-4X range for very long periods. this is the current range in ukraine.

several geopolitical analysts opined that to end the war 'quickly', russia needs to incur 5X-10X losses sustained for ~2 years.

remarkably, this is what happens when russia has moved on moderately fortified positions.
russia enters a speed or geometric trap where ukraine can, and has, incurred 10X-20X losses within a confined battle area. math-free MAGA has to believe, they will run out of dudes.

the most notable exception happened when russia had correctly identified some weak point AND were given advance notice that elon musk was cutting starlink comms for ukraine. at no other point than the initial invasion had russia done this well.

ukraine also does not do well when advancing, but here is the obvious thing : ukrainians are already in place within their own country. they could easily go all-in on deeply entrenched defenses behind current contested lines, and even with just EU support, hold of russia into perpetuity.
as long trump\gop does not significantly boost the russian economy, ukraine does not have to resort to this yet.