How to use LADSPA Plugins like from https://lsp-plug.in/

Linux Mint 21.2 - Kdenlive Flatpak 23.08.4
I have severall ladspa plugins installed in /usr/lib/ladspa/
The installeed plugin with many EQs etc in /usr/lib/ladspa/lsp-plugins-ladspa.so
is not found in Kdenlive

How can i do it?

Edit: I found out, i had to copy it to:
/var/lib/flatpak/app/org.kde.kdenlive/current/a767e5c8eb503519fcd4ed08e3c2a15cb16f894d63320c2ffa675c08448bda1e/files/lib/ladspa/lsp-plugins-ladspa.so

But without the great Gui of this lsp Plugins not usable. Sorry.
Hope that will be improved.