I have not been very impressed with the "bush" flights that MS2020 offers. All three of them are rather boring and I don't believe are done nearly as well as most of our TripTics ... disappointing. However, I did find something you might enjoy if you want to see some rough/beautiful landscape and encounter nearly impossible airports to land upon safely.
The is a fellow named Mike Fog on YouTube that is flying these. I watch his video, then I make the plan and fly it myself. The one discussed here is
https://www.youtube.com/watch?v=HCPUizIZM1Y&t=8s.
The flight planner for FS2020 is not ready for prime time, so when you try to set this up, you will get a "shuffled" routing. The airports are Departure: AYPE ... then AYHJ, AYMI, AYGA, AYII, AYEN and Arrival: AYUC. If you try to put in the departure and arrival, then use the "ADD" the route will be shuffled. To get things into the correct order, save the (screwy) plan that 2020 makes. Then open that PLN file in NotePad and with copy/paste put the airports in the proper order for the route. Then LOAD the saved NOTEPAD PLN file and you will have the correct route in FS2020. Your VFR map should look like the attached.
To save you some time, put in the Departure: AYPE and the Arrival:" AYUC and SAVE IT. Then download my PLN file (attached here). Now rename MY file name: New Guinea FoX 2.PLN to the name you have chosen. Copy my renamed file into where your MS2020 flight plans are and paste over the plan you made. Now go load the flight in 2020, and it will be all set up to fly for you.
For the novice pilots among us (like me) ... in the ASSISTANCE section, be sure to turn your Routes and Waypoints to "ON" and also the LANDING PATH to "ON". This will help you find the tiny airports and the landing path will give you a clue as to how to approach them. Also when flying one of these where you are landing at the waypoints, use the ATC, call up your next airport as you get closer, announce the runway and your position, and the "landing path" will show up for you.
I haven't been able yet to pull in the 2020 database into Little NavMap (if anybody knows how let me know). So you will not find most of these little airports if your Little NavMap is using FSX or P3D data. But the VFR map in 2020 should show this new plan for you nicely and help you navigate to the "next" one. Good luck.
Doug