How freaking narrow minded are you? Conventional doesn't always mean Fannie which should be obvious to someone whose clients are direct lenders. Like you, right? Credit unions and community banks are usually federally regulated. FRT/RRT requirements apply. Prolly half of every "prospective" I ever performed or reviewed involved SFR properties.
One report can contain multiple valuation scenarios so that's not the issue. (i.e., insurable value, liquidation value, etc)
The OP laid out a scenario. And they clarified what their question was. Engagement requires "as is" and "prospective". And they added a clarification at the end:
Besides that, you SHOULD open your mind to the possibility that such assignments may become more common in the future. I don't know if they will or won't and I'm not making any predictions. But there is a possibility. "Prospective" wasn't a thing with the feds during the last RE downturn. It came on during the boom when prices were increasing.
Heck, Fannie/Freddie might like to know but they may have problems asking for it due to how many appraisers already don't meet all of their other minimums. As a reviewer I have had to enforce this element of their engagement with a number of appraisers, every one of which initially resisted complying with it until I explained it to them. A couple of them refused outright (inadequate fee for the extra work) and the lender ended up cutting them off the approval panel. Good appraisers with lots of experience, but ultimately uncooperative with a couple of the explicit terms of their engagements. Another one they didn't want to do was actually develop their land value opinions instead of backing into them off the SC for the subject. Engagement letter said to do it but they wouldn't, even after I showed them there were land sales in the area that they could use.
You never know. If you actually are working for credit unions and community banks it's just a matter of time before their banking regulators catch up with them. You may be seeing this again. You might even have to figure out how to do it. Or not.