Weeding birders covered with tiny weeds.

I had them in a flower bed last year. I left them, hoping they were from the poppy seeds that I had scattered. They all died after the first frost.
I too have them in my grass this year. I think some of them are forget-me-nots. I don't like using weed killers but I have sprayed some of them with a lawn one. Unfortunately it rained afterwards, so I shall see whether it worked or not.

Are they sycamores?

You can hoe the borders It’s those growing along the edges in older tarmac Won’t hoe off was thinking of trying stiff yard brush. Don’t really want to resort to weed killer

I have these in my borders too……..had them last year and just leave them until they’re robust enough to pull out, roots and all, tried hoeing but they kept coming back.
Won’t be a problem when it snows as all the gardens will look the same……..just saying 🤷‍♀️

Just keep hoeing. Mulching helps as well.