> 1) Russian invasion of Ukraine in 2014? Donbass?

What exactly are you asking here?
> Will there be an invasion?

I do not know.

> Or has this war been going on for 7 years already?

This war lasts for 7+ years already.
That means another invasion may or may not happen.

> Then what other provocation under a false flag is needed?

"Needed" by who?

> Everything that is needed for the war has long been there.

Not everything.

> And now the armed conflict between Russia and NATO is simply escalating.

At what location, specifically, "armed conflict between Russia and NATO is simply escalating"?

> 2) Is the situation in Ukraine now the same as it was in Crimea or Donbass in 2014?

Partially no, partially yes.

> A significant part of the population of Ukraine is afraid of an interethnic conflict and shouts: "Putin help for us?"

I do not know about such "Putin help for us?" shouts in modern Ukraine.
Where does it happen?

> Is the population ready to support a referendum on Ukraine's accession to Russia?

Probably not.

> Not? Then don't you think that you are comparing different things?

What "different things" are you referring to?