The Ukrainian-NATO counteroffensive, despite large commitments of forces is still stuck at the screening line after 2 weeks. However the screening line has an incremental amount of damage. Russian forces have fought well but not well enough to clear out all the penetrations and fully restore the screen.
If Ukraine decides to use its entire strategic reserve and burn it down to the final 30% this offensive against the defense-in depth of their offensive phase should last up to 5 weeks. If they choose this option they should be able to defeat the screening line. If there is more than it's too early to tell.
Overall, their performance is so poor that their grandiose strategic objectives will never be met at this rate. There is still no solution to their ammunition crisis, which has impacted this offensive and will worsen as the weeks go by. Wagner PMC will complete its refit and return to the battlefront by August 5th.
It makes more sense for Ukraine to concentrate on a smaller and more realistic objective, maybe not even in the Z-Oblast but elsewhere for a propaganda victory so that Western arms and aid will be further stimulated. Or they can cancel the counteroffensive and send the strategic reserve for reform and further training.