Some are. In general, electrical and electronic equipment (EEE) are included within the scope of RoHS as of July 22, 2019.
Exception to this rule are Large Scale Stationary Industrial Tools (LSSIT), e.g. HP Scitex, Indigo, Web Press, 3D and their applicable supplies, which are not covered by RoHS.
EU Declarations of Conformity confirming RoHS compliance for various scoped HP supplies are available at http://hp.eu/certificates
If you need further support on the matter, do not hesitate to submit a ticket with us.