Tbh, i believe a L1C meta exists via multiple time axes even if they might not be a hypertimeline. Heck, full bleach cosmology likely is 6d.
I agree with this
reddit post except the 7d part and the almighty/tsukishima part. I believe the multiple time axes statement and almighty's mechanics are more of a support for 2d of time obtained from book of the end which creates different time axes that join the mainline at some point. Also, that this applies to the timeline of garganta rather than that of particular realms. Best proof is tsukishima training byakuya in the past in soul society, even if he inserted BoTE in Byakuya when he was in WoTL. Same with defeating aizen even if he was inside WoTL when sticking his sword in orihime and chad