The appearance of Widgets on the Home Screen is Apple's way of promoting what they consider a major new feature in iOS and iPadOS. I would guess the ones chosen for display on installation were carefully curated by Apple to show off particular features and options available in widgets. Widgets in general have been favorably received by the public and the press and while they are not a killer app they are a strong positive influencer. Widgets will almost certainly continue to be developed by Apple and third party developers, but whether or not they will be automatically added to the Home Screen after future upgrades or updates only Apple knows but that decision probably hasn't been made yet.
As I mentioned, the current iteration of Widgets originated in macOS 11 and made their way from there into iOS and iPadOS 15. You can find them in macOS 11 or 12 by clicking on the date/time at the far right end of the menu bar. In macOS that will bring up both Notifications and Widgets. As in iOS/iPadOS new widgets can be turned on or configured by clicking the plus sign at the bottom of the list. You will find most of the Apple Widgets in MacOS are duplicates of Widgets in iOS and iPadOS.
The vote that will have the most influence on Apple is the one you make with your pocketbook when you purchase another brand.
