Hardly unexpected. There is no European 5th gen these countries can buy. And the conflict with Ukraine showed that most 4th gens in current use in Europe are no match for Russian aircraft in service like the Su-35.
Something like Tranche 3A Eurofighter would be an exception. If anyone in Europe actually had that aircraft. The Rafale is another aircraft which can match well against the Su-35. But then again Russia is expected to get 5th gens themselves in numbers later this decade, which even upgraded 4th gen Eurocanards would have a hard time going against.
All those F-35 purchases you linked to also claim deliveries in 2029. There is no way Europe will have its own 5th or 6th gen in that timeframe. Probably will only happen in the 2030s.
I expect further purchases of the F-35 to happen. I would not be surprised if the UK, Germany, or both cracked and bought the F-35 in large numbers. Germany already is buying some as it is.
How has war in Ukraine shown that most 4th gen fighters in Europe aren't match for Su-35? Su-35 tech is in same level with upgraded "Legacy" Hornet and maybe Mirage 2000.