@Anonymouslyconercned one Lord of advice I always give to New mums.... avoid the word "should"! Babies don't read the manual, they don't know what they "should" do and when.
Naps are different from night sleep. Lots of babies dont do the same thing for both, that's normal and fine. They can take a while to learn to sleep incot/bed fornaps.
My eldest... had one nap in her bed of 30 minutes. Ever..... she needed some noise around her or she'd always wake up. Used to settle her on a nice form sofa that that had and put Downton Abbey onquietly so there were gentle voices in the background. She hated quiet and white noise just didn't do it, she needed voices to settle. She also didn't do any long naps between 10 weeks and 14 months.... 28 minutes only. Dropped all naps shortly after her 2nd birthday.
My boys were totally different. They mostly napped in the pram until 5 months (and for my mum, napped this way until 3 years! She'd park them in the garden and they'd merrily snooze for nearly 3 hours). They would nap in their cots, but needed some help to get over the first sleep transition - I had to sneak in at 30 minutes and do some patting/shushing/put dummy back in before they fully came round or it was game over. They'd then sleep for another 2 and a half hours pretty reliably. Didn't get to stop the resetting bit till they were 10 months or so, but it only took a moment so totally worth it.
My youngest is smaller than yours. Ive not attempted to self settle and she loves to sleep in the carrier at the moment. Shes always asleep while im still doing bedtimenfor the older ones and then i just transfer her.
My point is, children are all different even within a family. Even my identical twins dontsleep the same - one wakes every night for a wee some time between 1&3. It's a pain as it means someone has to get up with him still. But his twin brother sleeps through.... which means he's still in a happy at night and I have bonidea how that will end!
Try not to worry. And contact/motion naps are totally normal and ok at this age. It's also ok not to get much done! You don't need a perfect house right now. Even if you have things working perfectly sleep often falls apart totally at around this age and youhave to start from scratch!
Relax. Getting stressed about independebt napping is not worth it.