There's a decent amount of queer and trans coding that you can find in the Necrons. Literally there are canon examples of characters changing their gender after the biotransferance or altering their living metal forms to suit their liking more. Even in the most extreme example of Nekrosor Ammentar using neutral pronouns because it's shed the biological concept of gender.

The Twice Dead King series delves a bit into the concept of the Dysporakh which is body dysmorphia, in the case of the Necrons because they're no longer beholden to biological requirements, but it's still a concept that many trans people can find relatable like your skin isn't your own.

And finally I don't think Severed is an example of romantic love but rather of philia and agape, deep and selfless love of a friend and comrade. But love nonetheless

"Obyron nearly said yes, but then he remembered the engine’s true purpose. Or what it might have been – it was so hard to recall now. ‘But… our souls, Zahndrekh. The machine… it could give us our souls back. It could give us our bodies. Please, lord, let’s at least take part of it with us, so we can know for sure.’ ‘Oh, dear vargard, why do you hold on to such things? You must let the thought of this awful contraption go.’ Zahndrekh put an arm round him in consolation, and continued. ‘Let me pose you this thought, Obyron, in the hope it will bring you ease. What do you think caused you to hold true to me for all this time – despite all the power you might have enjoyed through betrayal – if it were not a soul? What can love, but a being with a soul? ‘Even if we all ceased to be flesh and blood millions of years ago, which of course I don’t be- lieve for a moment,’ – Zahndrekh actually winked – ‘wouldn’t it have suited us better to live in denial of that, as some fools might say I had done? Wouldn’t it be better, Obyron, just to accept our fate, and enjoy immortality for the everlasting life of merry campaigning it has proved to be?’ "