Level 20 uncut gems, how to drop in current patch?

When a map shows the monster level is 81, does that mean even rare monster will be max level 81? The reason I am asking this question is to be able to drop level 20 skill gems.

If that is the situation. Cureently, what is the best way or the ways to drop level 20 skill/spirit gems?

ceuase on the website it says:

hance to get level 20 gems by item level
In Early Access, this information can be datamined.

81 or lower: 0 (level 20 uncut gems are absolutely banned from dropping)

82: 1 in 81 uncut gems will be level 20

83: 1 in 33

84: 1 in 19

85: 2 in 35 (getting even one level 85 item requires 'stars aligned' luck, so this is in no way practical)

No known ways to get level 86 or higher loot exist at the moment, but the game files contain probabilities of 1 in 5 for level 86, 1 in 2 for 87, 8 in 9 for 88 and 32 in 33 for 89.

As uncut gems are quite common, running tier 15 and tier 16 maps that are irradiated and on corrupted ground will eventually find you the powerful lategame upgrade that is level 20 gems.

Warning: Level 20 gems require you to be character level 90 to use them.