This mod follows the instructions provided by WeptBurrito2749 and fixes the trees draw distance in MSFS 2020.
Please see post # 110:
https://forums.flightsimulator.com/t/lod-problems-trees-fix-revisited/296923/182

This package offers a few tree rendering choices as described below in the installation instructions.
One can run tests with each variant and make the choice that gives the result closest to expectations.

In the screen captures I used BijanStudio's winter tree textures for better contrast.

Installation instructions:
Please remove any tree distance draw fix mode that you might have, then unzip and copy one of the following choices in your community folder:

Trees_Distance_Draw_Fix(75-100)
>>>this choice keeps the MSFS default tree sizes, and renders the trees the furthest

Trees_Distance_Draw_Fix(75-100)-SmallerTrees
>>>this choice reduces most of the trees by 10% (the large jungle trees reduced by 20%), and renders the trees the furthest

Trees_Distance_Draw_Fix(50-75)
>>>this choice keeps the MSFS default tree sizes, and renders the trees a bit shorter but there are less tree pop-ups and the trees seem to look better in my opinion. The distance is still bigger than when MSFS was released.

Trees_Distance_Draw_Fix(50-75)-SmallerTrees
>>>this choice reduces most of the trees by 10% (the large jungle trees reduced by 20%), and renders the trees a bit shorter but there are less tree pop-ups and the trees seem to look better in my opinion. The distance is still bigger than when MSFS was released.

The credit goes entirely to WeptBurrito2749 for discovering this fix. Thank you!