okay, I have some accounting knowledge (not accredited) and it is from the eighties so take it for its worth, lol
I did a quick search that appears to indicate (and confirm to me) that the acquired company's losses can be used by the acquiring company against income.  But this is typically in the case of a complete take-over.  There is no selleable "tax credits" that can be sold to a third party while maintaining your ownership of the company.  https://madanca.com/articles/entry/tax-implications-of-mergers-in-canada/

Generally though, I agree with the point FTW makes, that this particular tax value is not something that supports or will hold up the share price, or will really be the reason or motivation for the take-over conversation.  So does this potential "accounting item" show up in any form in the share price?  I would agree the answer is no.