Good afternoon, crysyal !
I have a version for 4.20, but the Unreal Engine Marketplace requires that the last three versions 4.21 , 4.22 and 4.23 be specified. I can’t add version 4.20 to the market.
If you need version 4.20, you can buy the plugin on the market, send me a check for payment, and in this case I will send you the version for 4.20.