Board Thread:Questions and Answers/@comment-2070026-20200709165117/@comment-29325824-20200709165937

Yhwach did absorb Ichigo's powers, yes, but there are a few things to consider.

For one, Ichigo's powers are all fused together, they are one and the same. The fact that Ichigo was still able to use his Bankai afterwards, let alone his Shinigami powers in general, pretty much proved he wasn't permanently depowered.

Likewise, as seen with Liltotto and Bazz-B after the Auswahlen, it also appears that if Yhwach's power drain does not kill you, it does not seem to permanently rob your powers, just temporarily.

And finally, if you take the novels into account then, yes, Ichigo did regain his powers.

So, all this considered does point towards Ichigo still having all his power by the epilogue. Just how quickly they fully recovered is not clear.