There is a fine mesh strainer called a tamis. It is the key to smooth curds, creams, sauces, etc
tamis I buy in restaurant supply stores for $10 - 20 depending on size. A tamis with replaceable screen is about $150. I’ve never seen tamis in retail stores. You can probably get one online. Tamis is an indispensable tool in the commercial kitchen.
This is how fine the mesh is in the tamis
Not my photo, but how to use a tamis with a rubber bowl scraper