Phone: Google Pixel 5 plus CalyxOS at the moment. Probably will switch to pure LineageOS due to call recording support. The bootloader is locked so the phone is secure and does not call home. Highly recommend. Some apps and in-app purchases doesn't work well on microG, also there are some issues with paid apps. And Android UX sucks but it's a reasonable price to pay for privacy. In fact I've been suprised - with this phone I don't feel as bad as I expected.
I really hope that Pixel 6 will have better camera and bigger screen and also would be supported by Lineage.
PC: I have an AMD desktop with Gentoo and going to buy Purism laptop later.
Watch: I don't use them. Actually was going to buy next Apple Watch but...
Apple Pay: no good replacement, though contactless cards aren't THAT bad.
Apple Carplay: phone+organic maps.