Jumps current fresh blood situation is quite bad, at the moment 4 of it's non-new series are wrapping up and should be done within 6 months (We Never Learn within this month, Demon Slayer, Haiykuu and Neverland anywhere from 2 to 6 months depending on how they want to play it). Of it's current new series here is the knowledge we have:
Samurai 8: Sales of the vol are pitiful, always in the bottom 3 of weekly rankings of ToC (yes, ToC is not a good standard on its own, but generally paints a simliar picture when bundled with sales data)
Yozakura-san: Vol 1 failed to chart in top 50 in first and 2nd weeks of sales, estimated by Shoseki* (French blogger who extensibility covers oricon weekly sales, these are the best "data" we have for anything that fails to make top 50) to sell 11K first week and another 2.5K the 2nd week (so better then Samurai 8's sales of it's first vol at least). Generally been stuck in the bottom 4 of the ToC.
Mitama Security: Vol 1 failed to chart in top 50 in first and 2nd weeks of sales, estimated by Shoseki to have sold 5K in it's first week and didn't bother giving a number for the 2nd week. Generally been found towards the middle to the bottom middle of the pack in ToC, while it being a gag manga should give it some more leeway when it comes to sales...I don't think even a gag manga can survive on those supposed sales.
Zipman!: No Vols have been released yet. ToC info is....bad, already has begun to claim the last place spot that was held by Samurai 8 the past month.
Agravity Boys: Either 2 or 3 weeks worth of ToC info (still can never remember how double issues mess with it) has shown it already stuck in the bottom half and trending into the bottom 5 rankings.
The rest of the newcomers are way too early to even have data on....though I can't see 2 of those 3 (the knight and witch one maybe depending on its direction, if it can capture the adventure shounen audience well) surviving past a year in the magazine. Jump doesn't need a newcommer that is a hit out of the gates like Neverland was, but it needs a few series that aren't dead on arrival.