Lot of the biomass used in Denmark to form baseload power generation is imported.

"The utmost amount (46%) of wood pellets comes from the Baltic countries (Latvia and Estonia) and 30% from the USA, Canada and Russia.6 Estonia and Latvia have steadily been the primary exporters of biomass to Denmark, mainly in the form of wood pellets and wood chips."

https://noah.dk/Biomass-consumption-in-Denmark

https://www.eubioenergy.com/2025/03/13/no-smoke-without-fire...

So Denmark replaced lot of imported fossil fuels with imported wood.

Could we scale this form of energy generation to energy requirements of China, India?

No but every region has their own pros and cons. The idea Belgium has no other option than coal gas or nuclear is refuted, and biomass is just one of the reasons.