As others are pointing out, they have such a thing now in Power Apps (including "appifying") and the extended Power family.
But it's also not like Microsoft stopped trying to build such tools, they've had many fits and starts as priorities shifted and fads arrived and then faded away.
InfoPath tried to be it for the XML world (and preferably the XML world hosted by SharePoint).
SharePoint itself has always dabbled in trying to be a company's low dev solution for a lot information management/database stuff. The low dev stuff some companies have done in SharePoint Lists, for example, is wild. (A lot of the reason developers fear/hate SharePoint is the exact same "things I've seen" feeling from Access, with the added fun of upgrade issues of any modern CMS like WordPress. For most of its life Access maintained a lot of compatibility between versions until it stopped and changed file formats three times in a couple versions.)