Rotala indica. Thanks!Rotala indica - if it has round leaves and if it has egg shaped leaves it may not actually be rotala it could be bacopa Caroliniana
From the pics on google that doesn’t look accurate. The leaves on mine are rounded and egg-shaped, like Rocksor said. It is also more likely to be Rotala.Bacopa Carolinia. In the right conditions it'll grow right up and out of your tank.
They need root tabs ?Both are extremely similar and will grow pretty much the same. Best way to tell for sure is let it grow up and out of the water. If it flowers blue it’s bacopa , if it flowers pink it rotala.
Both are classed as a weed and “should” grow really well but like most terrestrial plants used under water, some do well in some tanks and poor in others.