SPF DMARC Postmaster

Hey guys, I am facing some issues with the Email Authentication Methods (DKIM; SPF; DMARC)

I am adding DKIM from AWS SES, and it is completely okay, no problems with this one.

I am adding SPF like "v=spf1 include:amazonses.com ~all" in a TXT record

I am adding DMARC and... well, this is not the problem

I connected my domain to postmaster to track how google is seeing my domain and I am getting this: DKIM: pass SPF: fail DMARC: fail

Why does it not receive SPF validation?

I would really appreciate your help. And if your answer will be something like: add ip4:192.168.0.1/16 in the SPF, could you please tell me if would I use it always? is it an IP from SES, or why does it should be that specific value?

Thank you in advance!