Gmail – How to Always Show Specific Sender in Gmail Inbox

I am amazed that there isn't an authoritative answer to this seemingly common request. No, I DON'T want to get rid of the Promotions category, which is mostly useful, but I want a simple way of saying – don't put mail from this sender into my "Promotions" – i.e. junk – folder. There is no obvious way to do this, either on the Gmail web page on my computer or in the Gmail app on my smartphone.

There is a "Not Promotions" button in the UI when a "Promotions" email is opened that moves that particular email from the "Promotions" category to the regular inbox, but this is just for that email, not from others from the same sender. Nor could I find any UI in the Global settings or on the Promotions tab itself allowing for what I want to do.

I look in vain for anything authoritative (i.e. from Google) answering this question. I find this which seems to be from a low-level Google staffer (a "diamond product expert", whatever that is) trying to be helpful, rather than an authoritative statement of how this is supposed to work from those who designed it. There is one apparently pertinent piece of advice there:

To correct, you can just drag and drop one such message from
Promotions to Primary and click Yes on the confirmation black box for
all future messages.

However, the "confirmation black box" described there for all future messages does NOT pop up upon making such a move. Evidently, it must have been there once, which leads me to ask, since they took it away, is the default to move all future emails from that sender or to move none of them?

It seems as if Google is just sort of adding features to Gmail willy-nilly without understanding how their users use existing features and what their changes might or might not break. I would expect better from Google.

Another site I found is for spammers, trying to help them get around the "Promotions" hassle for them. It suggests having users move the emails from Promotions to Inbox will automatically do the same for all future emails, but this page was written in 2013 and no longer appears to be the case.