Does it have a recognizable scent?

It has a very weak fragrance if at all, but nothing I could recognize

Stellaria media/Chickweed

Jay is right. Chickweed is a very common cool-season weed, often shows up with henbit. In fall I let it go as a groundcover in some beds. Food foragers like to eat it, like in a green smoothie or mixed into a salad.

Thanks for the responses. I'm unsure how it got there, seeing as I planted all the seedlings myself from store bought satchels but do see the similarities with chickweed.

It is definitely chickweed, not just similar to it. There's absolutely no doubt about it. Chickweed is a widespread weed around much of the world. It's capacity for spreading by seed is the reason for its global success. It is not at all surprising it's found its way to your garden. It could have come in the soil of your transplants or arrived from neighouring areas. Or it might have been in the seedbank of your garden already.