EU regulators are now eyeing mobile payments services such as Apple Pay after they sought industry feedback about Facebook’s planned Libra digital currency project.

The European Commission asked online-payment providers, banks and app businesses last month about how Apple devices may favour Apple Pay over other payment solutions.

Regulators confirmed they’d sent requests for information to market participants, without naming Apple. The EU commission said it was actively monitoring the development of mobile payment solutions, and of the behaviour by operators active in the payments sector, including mobile payments.

Apple Pay has been slow to roll out across Europe, only becoming available at the end of last year in Germany, the region’s largest market.