Hi, just sharing here in case someone is (still) looking/waiting for it.
One of my favorite MSFS2024 features, is the freedom to start a flight "cold & dark" and load a flightplan (especially long ones) using the new EFB. You can load/edit the flightplan and send it to the avionics on the fly (pun not intended).
However, in order to make it work, the airplane must be configured to utilize the newer v2 avionics. Luckily, at least for the GNS430/530 it requires a simple edit and there are zero issues (well tested over many weeks now).
You need to replace 2 lines in every PANEL.CFG file located in the "panel" folder and any "panel.<paint>" folders.
f16924ff-ba24-4cba-a700-5becf4555f81-image.png
For example, the 530 will need to be replaced from:
NavSystems/GPS/WT530/WT530
To:
NavSystems/WTGNSv2/WT530/WT530
Mind the different path.
Another view:
624257ec-aa72-4b9c-b318-bad6603233f8-image.png
Good luck!