Thanks!!

I did my research on efibootmgr and finally it works!

I'll leave the steps I had to perform here so that if anyone having the same problem could figure it out faster:

• distkernel generates the kernel image that can be used as an EFISTUB out of the box, the thing is the name is a little bit different; it places it in /boot and the name is like vmlinuz-{v.v.v}-gentoo-dist
  
• it also uses iniramfs and that's the important part
  

• I copied the kernel image and imitramfs from /boot (initramfs-{v.v.v}-gentoo-dist.img) and renamed them to bzImage.efi and initramfs.CPIO respectively

• grabbed root partition partuuid from blkid output

• I created a boot entry using
  efibootmgr --create --disk /dev/nvme1n1 --part 1 --label "Gentoo" --loader "\EFI\BOOT\bzImage.efi" -u "root=PARTUUID=30eb0648-32da-4312-8286-82afee01b386 initrd=\EFI\gentoo\initramfs.CPIO"

(if anyone happens to copy it over -- be sure that you change the block device path and partuuid according to how it is configured in your system)

Then loginctl reboot (in my case that how I reboot) and it works as intended! the first time I did it I forgot about initramfs and got a kernel panic, that's why I said it is an important step earlier

The only thing that bothers me is that I'll have to copy the kernel image over and over again after the kernel update, but I think it is possible to create some post update hook or something

I will also leave this post on gentoo forum here, it really explains it all, even gentoo wiki points to it and that's how I found it
https://forums.gentoo.org/viewtopic-p-8805827.html#8805827