I bet if you lower layer size you can get a couple layers on the numbers. It might help clear them up. Another option that I think might work better is to raise them up so that aren't indented, print it face down. Particularly on the textured PEI plate (if you don't have it, get one, seriously nice). Or use the PLA Support with it face down supporting the numbers. Supports that remove without damage takes some getting used to.
A 0.2mm nozzle is available from Bambu for the X1. One downside is that they do require their own accessories for some things. There are third party versions available if you want them. I like the complete hotends for about $35. Quick and easy swaps. I also tried a CHT 0.4mm from Amazon that uses threaded nozzles. It works well, and increases the speed by about 30%. You do need to do a flow test to take advantage of it, so you can configure the slicer properly.
While the speed is awesome, you might gain some quality slowing it down. As nice as the Bambu printers are, the speed can work against you. It might not matter, but do the belt adjustment procedure. It got bounced around etc and it's quick and easy to do, so even if you don't need it, it doesn't take much and might help with fine details a little.