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. Simply because the world has seen the true nature of the US and NATO over the past decades. The world is tired of a unipolar, dictatorial world. What other countries want is a multipolar, more equitable world. What Trump is doing is only helping to accelerate the de-dollarization process and attract more countries to join this revolution.
And provably Trump see this and one of his Intention is to leave a statement that US is a strong country that they need to obey. But to bad he maybe didn't calculate well the risk especially that they didn't foresee the possible effect of this implementation especially if there's country like China will fight back on the actions they have do.
Maybe for now they could justified that they are winning temporarily, but the long term effect of it is damaging to US especially that China is doing its job to create global alliance especially that they are active condemning on bad actions done by US. If US will fail on this, then provably that they can fasten up the de-dollarization process and maybe this might be the reason that their country will fall down.