Prices listed in fixed BTC in El Salvador?

I assume that merchants who accept BTC change their prices as BTC fluctuates vs the dollar.

Do we know if some merchs actually have a fixed price in BTC (maybe in satoshis) or is this not happening yet?

If it does happen, will that be significant?

I think it would as maybe it indicates that the merchant is paying for raw materials and electric bill in BTC -- the circular BTC economy would have started which I know is a big deal because no need to exchange BTC for dollars at that point and ES itself might end up sitting on many thousands, maybe even a million BTC that then become only rarely traded.