Pc to Xbox and cross platform progression

Why does gaijin not allow cross platform progression?

For example i am no longer able to play on my laptop due to outdated hardware and i am not able to acquire a better one but i have an xbox series x and i dont want to start over because i have done alot of progress on my current account.

How come every other free to play game have cross platform progression but not war thunder where it takes months to progress in each nation, unlike anything else on the play station store or the microsoft store?

Is there a reason they do not want to allow cross progression and account linking since its a basic feature on every game?
And how can i reach out so my suggestion can be heard out?