I haven't studied all the stuff yet, but they did note that 2019 and 2020 had a very low number due to lack of monsoon (non-soon) and when we get strikes up here in the considerably more moist midwest, fires are very rare except in the spring when things are very dry.
I don't think their network misses any strikes.
I'm not sure if the users over at Blitzortung can produce such a map as this or not. Years ago I saw some impressive data presentations from those who know how to access the strike archives, and while Blitz doesn't count all strikes, they are pretty uniform and consistant.
Dale
Maybe Cutty Sark Sailor or Greg or one of the other regulars have access to do this?