In Event Viewer/Windows Logs/Application, there might be an error logged like:
Log
Faulting application name: FlightSimulator.exe, version: 0.0.0.0, time stamp: 0x00000000
Faulting module name: FlightSimulator.exe, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x0000000001a12757
Faulting process id: 0x3680
Faulting application start time: 0x01d78f53977816d2
Faulting application path: C:\Program Files\WindowsApps\Microsoft.FlightSimulator_1.18.15.0_x64__8wekyb3d8bbwe\FlightSimulator.exe
Faulting module path: C:\Program Files\WindowsApps\Microsoft.FlightSimulator_1.18.15.0_x64__8wekyb3d8bbwe\FlightSimulator.exe
Report Id: 4df338a3-f284-4b68-b875-d7f66dee8cf1
Faulting package full name: Microsoft.FlightSimulator_1.18.15.0_x64__8wekyb3d8bbwe
Faulting package-relative application ID: App
You can just post such a log.
The Exception code, would be one of the most relevant information which may help.
You can also use/look in these threads for reference and help: