I believe GRX moves the chainline out by 2.5mm (but that might just be for 2x) and increases Q factor by 2.5mm on each side. What crank do you have now? Shimano Sora? I didn’t know Sora came in a 1x configuration. I’m wondering what bottom bracket you currently have.
You could maybe look at Shimano urban cranks like Alfine and Metrea.