Hey there, I tried the brush in Ibis and it looks a lot like one I use from the deevad pack. The only difference is that the tip of the brush (which is oval) is in a different position, but you can easily rotate it in Krita.
Here’s the brush: b3) Basic Oval Brush - deevad 23.01
What I did was rotate it 90 degrees
And here’s the link to the pack: [update] Deevad 2025-01 Brush Bundle
A quick sketch I drew while testing the brush xd:
