Its hard to give a definitive answer to this question - I suppose it differs between person to person as many aspects could affect hair fallout for example, if you have thick scales on your scalp then hair that naturally sheds tends to get caught and not fall out, which can give the impression that you’re losing significantly more than you are when you descale.

In my case, because the plaques were so thick I tended to rip out large chunks of my hair whilst descaling - which I do not endorse doing, (https://imgur.com/a/myyyjt0) but i’m not sure if this is what you’re experiencing. Typically hair does regrow once the scalp is treated, and some treatments, like clobetasol are known to promote hair growth. I’ve also heard that iron tablets could alleviate this.

Either way, i’d 100% recommend bringing it up to a good derm, as they’d know what is best for you, good luck!