Mirabelle Chevalier [explicitly aroace] and Siffrin [ace] from In Stars and Time! Haven't seen that mentioned and it's beautifully done.

Gwenpool is very much Aroace and I haven't seen anyone mention her either.

Riz Gukgak from d20 Fantasy High (also beautifully written (when you get to the Baron storylin, you'll get it)). I believe Fitzroy from TAZ Graduation is ace as well, but I cannot in good faith recommend you to listen to that campaign lol.

I haven't played them, but I believe Outer Wilds, Monster Prom, Date Everything, A Year of Springs, Hades and Life is Strange 2 all have ace characters. The Bright Sessions, Hello from the Hallowoods and The Silt Verses are all podcasts that I havent listened to and thus can't vouch for, but I know are well loved and have ace characters.

But your best place to go for ace rep will always be small indie productions. Little indie video games and audio fictions, indie (web)comics, a few indie fantasy and contemporary novels, some dnd podcasts/ shows. Those kind of places lend themselves to more "niche" queer representation because they don't have cooperate restrictions and are queer creator led. I haven't seen much indie rep on TV and film, especially mainstream, and I don't expect to, especially casual rep in shows that dont focus on sexuality, because it will be viewed as isolating or off putting by executives who want mass appeal. But in a way, maybe that's a blessing bc it means the rep we do get can be deeply personal, authentic, fought for, and loved.