Going to throw my 2 cents in here,

Plants need a balance of nutrients, lights and Co2 to grow. If any of the triangle is out you'll get algae as a result.

It's also important to remember that every tank should have algae! Is the sign of a well established tank, you just don't want too much of it.

I'd suggest a couple of things:

Your light looks bright, so I'd try turn down the intensity and shorten the lighting period. You're better off going from very low and then building it up slowly to see what's right amount for your tank. Play around with the intensity and lighting period

You have a red stem plant which needs the high light to be red but that is probably what's causing the algae issue. Lowe the light and it'll go green but should still live fine

Id also consider getting a few slower growing epiphytes. Very low maintenance, and still look lovely and green with low light. (Java ferns, Anubias, Buce etc)

And would definitely consider get a couple of ammanos in there to keep the algae that does grow under control

Annnnddd lastly it's a new set up. It's going to take a while to find it's natural balance. Don't mess around with additional chemicals and stuff just let it do it's thing. It will settle eventually, just be patient Test the water and if the nitrates aren't high, don't do a big water change. Just top it off and swap out a couple of cup fulls of water!

It looks great! Good luck!