So, from a linked article to the one you sent, it looks like batteries themselves are included in the tarrifs

https://www.wired.com/story/new-ev-china-tariffs-biden/

Electric vehicle batteries and battery components will also be subject to new tariffs—Chinese lithium-ion battery tariffs rise from 7.5 percent to 25 percent, and rates for Chinese critical minerals, including manganese and cobalt, will move from 0 percent to 25 percent.

But from the link you sent, for ebikes it appears only their batteries are included and complete bikes are not clearly defined (which I would assume to be not explicitly included at this stage)?

In a written statement, Angela Perez, a spokesperson for the USTR, said that e-bike batteries imported from China on their own will be subject to new tariffs of 25 percent in 2026, up from 7.5 percent.

But it’s unclear whether imported complete e-bikes, as well as other cycling products including children’s bicycles and bicycle trailers, might be affected by new US trade policies. These products have technically been subject to 25 percent tariffs since the Trump administration. But US trade officials have consistently used exclusions to waive tariffs for many of those cycling products. The latest round of exclusions are set to expire at the end of this month.