Well, 10 hours of light per day.

CO2 sounds like most of the issues.

You also chose more advanced plants.
The tank is small, you might consider getting a bag of ADA As given your plant choices. That will help some and not cost that much given you need only 1 bag and will have some extra.

But CO2 is really the issue.
The dosing with EI rules out the rest.

Fast growing agressive plants, Anacharis, Riccia etc, they grow and so do the other plants, but not well.

New tanks get water changes every 2-3 days or 2x a week for myself.
Both Amano and I both do this although I recently found out that he does about the same routine there as myself.

After 1-2 months, less water changes are required so weekly is fine.

Note the differences you see in plant growth after the water changes.
Pay careful attention to it.
Do you see better growth after?

Also, dose EI right after water changes(do every other day or at least 2x a week to start).

Regards,
Tom Barr