Are you able to add a closer pic? And where is this growing?

Really hard to see any detail but I think we are looking at a Veronica, perhaps V serpyllifolia or V arvensis, both of which can be lawn weeds and have small flowers and oval leaves, if those are possibilities in your part of the world.

Eta looking on my iPad, which has better magnification, it’s not V serpyllifolia. So likely V arvensis.