To be fair you don't know if it is or isn't, people didn't used to see it as much even without stopping games, now we do, covid is an obvious big change, not beyond the realms of possibility that its at least partly involved, whether the virus itself as well as some cases with the jabs.
The vaccines do cause heart inflammation issues especially in men. It went up a bit recently from past figures, the studies revealed a bit higher % per 1000 or whatever it was, still was small overall. But it wouldn't surprise me if it was a bit more common that comes out in the next years.
Especially with giving people booster shots and keeping them on high antibody alert. This was mentioned recently by eu regulators that it is likely to cause the immune system to weaken and maybe that has other adverse affects, who knows.