Recommend me a portable amp for home and work!

I own an enya nova sonic go, it has an inbuilt ten watt speaker , so if the amp has less it would be useless to me , it also has aux input already and Bluetooth too

I need an amp that is either same watt as the Enya, or maybe even tad bit higher

I need it to be small enough to put in a backpack, but not too tiny

Overall I just need an amp that is better quality than the inbuilt speaker

I've already checked out the positive spark grid go, im not sure if it'll be good enough for me

My budget is like 100-120 euros or dollars ig