Isogender Is not trans in denial!! Someone may be an identity that still aligns heavily with their agab! So they don't feel like part of the trans community! But they don't have to identify as cis because their identity isn't fully the same as their agab.
My sister is enby. They are afab and use they/she pronouns. As you can tell, they are still heavily fem-aligned. They feel that them being enby doesn't take away their identity as an afab but also doesn't make them a woman. They don't use this label but that's an example of why someone might.
There are lots of labels for systems who have strange experiences with being trans! This is a label some of our transfem alters are interested in. We are afab and masc-transitioning enby. So our body will not be cis to them ever either. But they were still formed in an afab body so using trans doesn't feel quite right to them. Boom! (used for reference: instagram account nocontext_inclus and lgbt-pride.fandom.com ).
I believe this flag was coined by @beyond-mogai-pride-flags and from top to bottom, the colours represent; masc, fem, mix of both, and the gradient represents a strong-to-weak attachment to gender, from top to bottom. (Source: lgbtqia.wiki and mogai.miraheze.org ).