Do you have any fics where Steve was attracted to Howard? Like Steve has a type and it’s Stark men but the main ship is still Steve/Tony, as in Coming Home by Sonora.

I don’t know of many like that, but here are some that you might enjoy.  Some of these are not necessarily happy endings or healthy relationships, so mind the tags.

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Hidden Past by QuietShade:
After opening his eyes in the not so distant past Tony discovers that sometimes some truths must and should remain hidden.

Understanding Something Doesn’t Mean You Can Change It (Except When You Can) by sirona:
How Howard Stark went from Captain America’s Howard Stark to the
one Tony grew up with. And a possible explanation for Tony’s Mom not
taking more of an interest in her son. And Tony coping with the parents
he’s been saddled with. With bonus appearances from Peggy Carter, Dummy
and, eventually, Steve himself.

(sort of a pining!Steve, wistful, open ending for Stony and one-sided Howard/Steve)

Film Yellow and Film Gold by lotesse:
Sex, Steve, and videotape: Tony has Jarvis project the transferred film
onto the ceiling above his bed, lies there on his back and watches the
now-metaphorical reels spool out

Pillow Talk by reeby10:
Asking about past sex partners isn’t really ideal pillow talk.

Firsts by hanyou_elf:
Three very important firsts that Steve has to endure.  A loss of virginity in three ways.

Looks Innocent Enough by Cassy27:
Tony meets his father’s new boyfriend. It’s the start of a whole new mess.

Lovers of Mere Moments by kendra: A coda to the news that Agent Coulson was down; “Tony
kisses like he was born for this moment – that he exists just for Steve
– and damn if he doesn’t take all of it for himself.”

Cat’s in the Cradle by doctorzeiger:
Avengers Kink Meme fill for the prompt: Steve/Tony, That awkward moment when… — …
Steve and Tony, after all the posturing and flirting and nonsense,
finally get down to the good stuff, only for Steve to accidentally, in
the throes of passion, call out “Howard” instead of “Tony”.)
and the one you mentioned:

Coming Home by Sonora:
When S.H.I.E.L.D. approaches Tony Stark to help with their 1940s
deception for Steve Rogers, to be a semi-familiar face and name to help
re-introduce him to the world, Tony agrees on one condition – that it’s
his show to run.  And at first, it seems like his plan’s going off
without a hitch.  What he doesn’t account for, however, are his own
growing feelings for Steve.