UC San Francisco researchers are reporting,

E-bicycle injuries doubled every year from 2017 to 2022, while e-scooter injuries rose by 45 percent each year.
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They found that e-bicycle injuries dramatically increased from 751 in 2017 to 23,493 in 2022, and e-scooter injuries rose from 8,566 to 56,847 over that timeframe.

However, note that regular bicycle and scooter injuries are much higher, apparently because, there are a lot more riders for non-electric bicycles and scooters.

... [from 2017 to 2022] there were nearly 2.5 million bicycle injuries (non-electric), more than 304,000 scooter (non-electric) injuries, 45,586 e-bicycle injuries and 189,517 e-scooter injuries in the U.S.
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The median age was 39 years old for injured e-bicyclists, compared to 30 for injured conventional bikers. The median age for e-scooter riders was 30 compared to 11 for conventional scooter riders.
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“Our findings stress a concerning trend: helmet usage is noticeably lower among electric vehicle users, and risky behaviors, such as riding under the influence, are more prevalent”