Since everyone uses AGAB to refer to way more shit than what it should be used for, here's some suggestions.
Instead of "AFAB/AMAB childhood", say "raised as a girl/boy" or "imposed female/male in childhood", you could even say your SIG was male or female, this would be a fine use of intersex terminology by perisex people.
Not everyone AMAB was raised as a boy. Not everyone AFAB was raised as a girl. Some (intersex) people were even legally, socially, and/or medically Reassigned a Gender After Birth (RGAB). You should not use AGAB when referring to what someone was raised as, because it erases people who weren't raised the way you'd expect.
Instead of "AFAB/AMAB bodies", say words you mean, if you are talking about periods, say periods, if you are talking about penises, say penis, if you are talking about breast development, say breast development, if you are talking about a vulva, say vulva, if you are talking about testosterone puberty, say testosterone puberty.
If you are looking for words to replace "male" and "female" as not to misgender trans people, say "people with TWDP" or "people with TMDP" Note this terminology only applies to perisex people, including people who have had these traits changed later in life, or had their development altered by outside influences, you could say folks like this have an Altered-TSDP, (Typical Sex Development Pathway) if it is relevant.
Not everyone AMAB has (or had) the same body parts, testosterone puberty, hormone levels, or voices. Not everyone AFAB has (or had) the same body parts, estrogen puberty, hormone levels, menstruation, or voices. Using AGAB to refer to these things erases people who don't fit into this binary, such as intersex people, and trans people who started their transition in childhood and had access to puberty blockers.
Instead of "AFAB trans people and AMAB trans people", say "trans people - ", and then talk about whatever specific thing you're using AGAB as a substitute for.
There is no reason to group sex variant people by what they were assigned at birth (a system of oppression against sex variant people) and then tack on a bunch of perinormative and transphobic assumptions about the rest of their lives based on that assignment.
If you do that, you are being intersexist and transphobic. You are just participating in the further oppression of sex variant people.