Yes. Both those topics are covered in our wiki article. Take a look and let us know if you have any questions.
https://discovery.endeavouros.com/installation/systemd-boot/2022/12/
The short answer, described in the article more fully is:
- You set the kernel options in
/etc/kernel/cmdline - You change the default kernel in
/efi/loader/loader.confby setting thedefaultusing wildcards