This already happened. The US government cut off a judge at the international criminal court from her Office365 account because she was pressing a war crimes case against Benjamin Netanyahu.
It's the reason why in the last year you've seen multiple European governments very quickly build an escape hatch against US tech.
We all expect that you'll use our dependency on US services as a weapon, you've already done so, so we're phasing you out. It'll take decades to repair the lost trust in US digital services among the governments of Europe.
I call bullshit on the "very quickly" part there. It'll take a decade to phase out. And some don't seem interested at all (my employer for instance).
If it's the same woman I'm thinking of Office365 is underselling it a bit - she's fully sanctioned by the US. She can't use debit/credit cards, any Apple/Google device or service, Amazon/eBay, etc. She's completely digitally crippled by sanctions. And she's one of several people.
As a European I really hope we create an entirely separate homegrown tech sector, and fast.