Yes it does, small units yes are days or at most a couple of weeks.

Larger units, can easily take months and months. Unless you have a large amount of money to throw around. This is not even a friend of a friend thing. *I* know 2 places, both customers of the company I work for that had to have a 20MWA transformers replaced. Both took 120+ days between PSEG telling them they had to buy new ones and the delivery. And they were ordered within hours of the go-ahead since the issue was known. Could have had a pair of 10s in within a month or less. But the larger ones, nope.

*Yes you can get used ones, or non "name brand" ones, or imported ones for less. Good luck getting insured or an electrical inspector to sign off on it if you put those in.
And that is what causes people to think you can get them sooner. There are a lot of used / refurbished ones out there that are 100% fine. Ford can put them in their factories since Ford is responsible to Ford and a Ford electrician signs off on it and they are insured by some company they can boss around. Dave's customer in a small industrial building whos unit was failing when hitting 80% got no choice. They had to get new.

But, back to the hashrate drop. Due to the heat hitting the US Pacific NW I know there are some places that cannot keep up with cooling so they are shutting off miners during the day. If you based your cooling on 90F as max sustained outside temperature, with 95F as a limited daytime hours temperature and it's been hitting 100+ every day for hours and hours, yes you might be shutting some things off before your cooling system tells you it's going on vacation.  So there is some loss from there too.

-Dave