I think lessons from Ukraine will fundamentally shape the medium term development direction of all major militaries around the world. I don’t think anyone from Ukraine is particularly bothered about having magic rounds that can punch through level 4 plate at 400m+ ranges, principally since it would be incredibly rare for line infantry to get an opportunity to even have a crack at targets at that range.
You go plinking away trying to play CoD in real life and you rapidly end up with 2-3 sniper rounds smearing your brains all over the trench.
For long range anti heavy-infantry work, China seems way ahead of the curve with its man-portable mini-missile launchers, since a lot of the time both sides end up using ATGMs at exposed enemy infantry at extended ranges.
The US 6.8 seems the ultimate in fighting-the-last-war silliness, which seems to have been developed after fighting farmers in Afghanistan for a decade and deciding the next war is going to be exactly the same, only opfor is going to be PLA with ballistic plates, but everything else is exactly the same as fighting farmers.