De-dolarization seem to be happening even before Biden, they know a few countries are sanctioned through Swift so they know possibilities since then.
If the US did the right thing by making countries and allies feel important, it would continue to dominate politically, and possibly, the de-dollarisation agenda may fail or be weakened. Not what Trump is doing, that friends, partners and allies are now like enemies. They wouldn't care about another alliance.
Even if Trump were not president or if he did not do all those things to harm allies and the world, that would not stop the BRICS de-dollarization agenda.
You are right! But it would not make the BRICS's future as bright as it is now.
Trump has opened the eyes of friends and foes to avoid the US as much as they can, or better still, not rely on its Greek offers that can later be used against them. Ordinarily, there should be power diffusion across the globe, it's bad for a country to be the mightiest one, it will one day use that dominance against the others.
I've never thought of this before until Trump also opened my eyes, so, expect the de-dollarization agenda to thrive more, but it will take decades before its effect will be felt.