Irreducible complexity (and similar ID arguments) also run into the problem that it is not directly detecting the presence of design, but merely inferring design from the purported lack of a viable evolutionary explanation.
A more accurate description of IC (and similar ID arguments) would therefore be “design deduction”, rather than the “design detection” (that has been repeatedly asserted, most recently on this thread, but also on a number of other occasions on this forum, going back as far as 2018).
This indirect method of leading with a claim of a purported lack of a viable evolutionary explanation also runs into the issue that it renders ID indistinguishable from creationism – which likewise has anti-evolutionism as a core tenet. This difficulty-to-distinguish is exacerbated by the fact that many ID advocates identify ID’s “designer” with Christianity’s creator God.