Hello i recently downloaded a lot of 3th party sceneries from flightsim.to and none of them has SİD or STARS? how can i solve this
There is no easy way and you can so this only manually. You must find out which package removes/disables the navdata.
So, move all packages, excluding the navigraph-packages, from your community folder in MSFS 2020 to a backup folder outside your community folder.
Then, start the sim and check if you can select terminal procedures. When yes, move one package to another in the community folder back, and check after each package if the terminal procedures are selectable or not.
One package removes the navdata, and this manual check is the only solution to determine which one.
Cheers
Richard