I can kinda give you a response here because you're on the nose about a few things, but what you describe isn't my exact experience.
My partner and I are both FTM, and largely because we're able to understand each other wholly in a way a cis person can't (though they might sympathize, they just can't empathize properly) and also look out for each other in the ways we need to. I've dated mostly other trans guys, only two short cis relationships that ended because we were teenagers and just didn't click. But at that time I wasn't out yet, so I suppose after coming out and transitioning medically I've only dated trans men.
Most of the people I know are in the same situation. I can only think of one situation where a trans man friend is with a gay cis guy, and it has a lot of issues, some of which being that lack of understanding and tact.
In terms of physicality, we find out ways just like any other same-sex couple. Sex has a wider definition I find in queer spaces due to lack of traditional body parts, but also every trans person wants different things. Some don't want any penetration at all, some want only anal, some only vaginal (hi). Building on that, the majority of trans men I know absolutely beyond doubt do NOT want to carry a child. They see it as something so unbelievably triggering, and I know quite a few whose goals might not involve phalloplasty, but at the very minimum, a hysterectomy.
On another related note, I have some pre-existing trauma that makes it hard for me to be intimate with cis guys (even though I want to like, really bad). There needs to be a lot of trust, otherwise I freeze up and my body feels like a rock. I ended up matching with a trans woman in my area who I was really attracted to - hence my 90% gay 10% straight lol - and I was able to have full PIV sex with her with no issues, and it was a first-time situation for me having real flesh PIV lol. Eventually my partner joined and we all had some fun together here and there. Having that bond in acknowledging one another's transition and true identities made me (and my partner, who's way more into women than I am lol) completely comfortable, whereas with a cis guy who I didn't trust I would not only be all locked up but also terrified that they thought of me as a girl. It's pretty complicated.
Anyway, I don't think any specific kind of relationship is encouraged more than another in the trans and queer community. What (generally) people say is just date somebody who truly respects you, and stands up for you. Trans, cis, non binary, whatever, date who you like and mutually respect and take it from there.
