Thanks for the chapter!
Can you remind me which chapter was it?
Sure. The complete rundown of the situation is as follows:
Chapter 401, page 19 - Ali says it's time to "make a move" and we're shown the gates to the Great Beyond
Chapter 418, page 11 - Ali says he got ejected from the ring while being there
Chapter 419, page 16 - we see that even in his avatar of gluttony form he's no longer tethered to the ring, and we get to see this again even more clearly in chapter 420, on page 9.
Chapter 421, pages 13-14 - this one you should remember, Ali straight up turns into Delkira to cast a spell despite looking like he's about to run out of mana completely just a page prior
And finally chapter 422 page 19 - the top right panel shows
something leaving those parting words
And I've double checked right now - since that moment we haven't seen Ali, and haven't even seen Iruma himself using magic even once.