The leaders in hydrogen from electricity have tended to be the leaders in renewable electricity (perhaps with the US being a notable exception), due to the connectedness of surplus renewable electricity and the economic incentive to use the electricity. The main policy driver has been reduction in carbon emissions. British Columbia has been looking hard at using its renewable electricity to create hydrogen for export and its newly adopted renewable gas standard (including hydrogen) for its pipeline gas is expected by some to provide a comparatively large market for renewable hydrogen there.
Commitments to meeting carbon emission reduction targets in Europe and Asia have resulted in plans to invest tens of billions of dollars in green hydrogen production. These pledges are likely the reason that major electrolyzer manufacturers are being bought up by large corporations and announcing major manufacturing capability expansions.