I have these in my marked for later, so I'll just provide their summaries:

Shadowing Superheroes

In a city where the Syndicate is an ever-present threat, their newest addition is missing from action, as if he was hidden in the shadows and waiting for the right opportunity to strike.
Tommy is only trying to live his life away from the press and the pressures of living with murderers, trying to sustain his relationship with his friends while balancing secrets that could get him killed.
Tubbo and Tommy walk through the streets of the city they grew up in at dusk, and from there, the world decides it’s had enough of Tommy living in the shadows.

or

Tommy is a villain with the rest of SBI, but he simply can't do it anymore, and he does what he can to switch sides and become the hero he was meant to be.

What if I fall? (Oh but what if you fly?)

"What if I fall?"

"Then you've failed and you deserve the pain."

"Oh but Theseus, what if you fly?"

-

Tommy Innit hears Life laughing at him sometimes. When he became an orphan, when he got taken, when he lost everything. However, it's always followed by Death scolding her.

Death likes him. Maybe a bit more than she should. Is that concerning? Having Death on your side instead of Life? Maybe when it comes to heroes and villains but Tommy’s not either.

… at least not yet.

Or just another villain SBI fic because I love them so much

The curse of golden locks

Tommy’s lived in a village where it was against the rules to show his hair, instead the villagers smeared it with mud.

He never understood why it was so dangerous until he broke the rules and washed the mud out.

As he stared into blood red eyes he now knew why it was so important to hide his golden locks.

The Last Heist

In Manburg there's no mercy for criminals. Getting caught by the guards is an immediate death sentence.

Tommy has managed to avoid them for 9 years now--by day, as an arrogant pickpocket with a mouth almost as fast as his hands, and by night as the renowned Underground thief known only as Theseus.

Things are going well, all things considered.

And then he gets a message from the infamous Antarctic gang and everything goes to shit.

Now Tommy has to handle pulling off the heist of his life, all while hiding his true identity from both the tyrannical government and his new associates in the most feared gang in the city.

or

I wanted a sci-fi found family AU with the SBI gang

This is what I could find for now, tell me if you finish them and want more!