That's really not Apple's problem. Flash Player is dead. Adobe has declared that all support for the plugin will end in December 2020, and every major web browser has indicated that they intend to discontinue support for the plugin in advance of that date. Some desktop browsers (including Chrome and Firefox) have already disabled Flash content by default, and the Flash plugin for Android was discontinued in 2012.
At this point though, Flash is known to be dead and buried and folks that haven't migrated off of it have made their own beds[1].
1. ...And unfortunately caused a lot of headache for quite a few parents with multiple children that are trying to let all their children learn concurrently on different devices they have around the house.
What are you referring to when you say "when Apple killed Flash"?
The big outcry was back when Apple made it clear that they would never add Flash support to iOS. But that support never existed in the first place -- one can hardly "kill" something which was never alive.
Desktop Safari still supports Flash, for now. It's off by default (with a "click to enable" icon), but that's no different from how it's handled in other browsers. All signs indicate that they intend to remove Flash support with the next major release, but that just puts them on the same track as everyone else.
And yea - I agree that flash is dead at this point and I'm quite happy it's gone. Apple actually contributed significantly to the death of flash based advertisements and there is nothing in the world I hated more than those.
I also really dislike Apple's usual "my way or the highway approach" (it's causing my nephews serious issues since some of their remote learning tools use flash which Apple refuses to support) but in this case they are using the right approach to make it a smooth transition.