I drink a lot of coffee with butter in it (you can use coconut oil if you want). That’s free fat without adding any more protein grams. Without that I’d be way over my protein requirements trying to get all the fat I need through meat sources alone. If you like cream cheese; that’s also a good way to get fat with minimal protein.
I find that using the fattiest cuts of meat makes managing my protein much easier. Pork belly, bacon, ribeye, 73/27 ground beef…Edited to add: why we need to keep protein in check – because excessive protein is anti-ketogenic and will lower your ketones and possibly keep you out of ketosis.
Make sure you are choosing fattier cuts of meat like chicken thighs instead of breasts and ribeye instead of sirloin. Pork belly is amazing, too! Also, cook in fat and add fat to everything (compound butter, aioli, and alfredo sauce are tasty ideas). Avocados are also a yummy and nutritious fat source.