Daytime naps!

My baby sleeps absolutely AMAZING during the night. 6 week old - sleeps 5-6 hours without waking. (I know that’s a bit long without food please don’t mom shame me). On a good night he either goes down from 6-9 PM or 7-10 PM. I get him down again usually around 11/12. He then wakes up for an early morning feed and sleeps again until about 9/10/11 AM another 4 hour block usually.

Does anyone have tips to help him nap during the day? He fights his naps ALL day and maybe takes 3/4 20 min catnaps. I’m lucky if I get one good 45/1hr. Nap in during the day time. Could it be because he is sleeping so well in the night/morning?! Any positive advice and feedback greatly appreciated and welcomed! Thanks I’m advance fellow mamas!