2hp MIDI Eurorack

[bassinfected]

That's not a USB host port, its a client port for connecting to a PC's host port. It won't power anything. That module is specifically a PC to CV interface as there is no 5 pin DIN input.
Generally, if The NDLR USB cable can't plug into it, then its the wrong type of port. The exception might be with a USB C port, but that's a can of worms.

There are some MIDI to CV eurorack modules with a USB host port. Look for the USB Type A socket on them and they are probably labeled "Host". You can of course also use a cheaper MIDI to CV that has a 5 pin DIN input.

The NDLR has 4 USB virtual MIDI I/Os which, while being "class compliant" might confuse a less robust USB host. YMMV, I would stick with 5 pin DIN which also offers better timing.

Yes, i also have an Eloquencer with EME expander but NDLR does not power up when i connect it via USB.
I wish it had another way to power it.