Soledar is pretty much gone really, Russians managed to flank into positions giving them a superior firing situation like 24 hours ago now. I don't know whether Russia can sustain the gains though - been a lot of troop rotation/repositioning and some are saying they've basically thrown everything they have in reserve to make the current gains.
Regardless Ukraine needs lots of self-propelled artillery and anti-air to stay on top of the situation around Bakhmut - obviously lots of training and logistic considerations, etc. but they need a load of AHS Krab, Gepards, etc.