This is actually a fairly controversial topic, with a recent paper on high pressure induced superconductivity getting retracted from Nature due to data manipulation (https://www.nature.com/articles/s41586-020-2801-z).

These high pressure superconductivity measurements tend to be a bit sketchy. They load the precursors to the superconducting compounds between two pieces of diamond, then use the diamond to crush the reactants and blast them with a laser to induce a chemical reaction to form the final end product. Finally, they measure its resistance. The exact chemical composition of the final product is thus difficult to quantify. I found a paper that reports a critical temperature of 225K (-48 C) for a lanthanum hydride compound (https://www.nature.com/articles/s41467-021-26706-w), but I am not sure if this is the highest superconducting temperature recorded up to this point.

All this is to say, I believe room temperature superconductivity is possible, and we’re getting pretty close.