Itts hard to see, but FYI, the stem has dark purple color

Did you sow vegetables? Ornamentals? Can you narrow down the possibilities a bit for us?

Mostly vegetables. But this could be a weed plant too, I try to let them grow so I can later check if they are useful or not.

Could it be Malabar spinach?

It does have some similarity, but its not malabar spinach since I am very familiar with those and leaves of these plants are not edible.

Not sure I want to know how you determined they’re not edible...

tj

Just nibbled on small piece of the leave :-)

I took closeup of leaves, if that helps. Btw, I transplanted then on the soil and while doing that I noticed they seem to have strong tap roots, wonder if they become trees!