We don't have much information in Germany.
But if you look at the Oslo Open in Norway, a handicapped event from a few years ago, you will find Souquet, Gorst, He, Feijen, Wiktor Zielinski, Casper M, Pijus L, Damianos, Imran Majid, Mark Gray, etc. There are other ones like this like the Interpool Open in Sweden.
If you look at the following event from this February, you see top players like Wojciech Szewzyk or Mario He start at -2 and go to 8 while the weakest players start at 5 going to 8. Francesco Candela, a 747 from Italy, gets a spot from the top dogs. Karl Gnadeberg, a 712 from Estonia, gets a 2-games spot from the top dogs.
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Finland has a high number of top players, and if you look for example at Petri Makkonen, the highest rated, you'll see multiple handicapped tournaments per week
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Greece has a lot of top players, and Alex Kazakis is the best. If you look at his schedule you'll see 8 or 9 handicapped tournaments in the last 2 months
CueScore helps people organize and run billiard tournaments, keep track of events near you, view livescores and checkout your competition. Run tournaments for you and your friends, or enter national championships in the same system.
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This kind of thing--any of it--would be unheard of in the US for the top players.