Intel® Celeron N4120: this processor has a frequency of only 1.1 GHz and a maximum of 2.6 GHz in Turbo Speed mode. I’m afraid that’s not enough for real-time audio. A frequency of at least 2,5 to 3 GHz seems to me to be ideally necessary to work serenely.
If you’re looking for a compact solution, it’s better to go for mini PCs. I know a musician who use one for live performance with very heavy configurations (20 to 30 plugins simultaneously).
GEEKOM Mini IT11, i7-11390H 2.9GHz (up to 5.0GHz), 32GB DDR4 RAM 1TB M.2 SSD for 450€
Just add a touch screen of the size you want and you’ve got a more compact and more powerful solution for real-time performance.