Are Russian unmanned aircraft operators registered in the EU Member State allowed to operate unmanned aircraft within the EU?
No, under the sanction regulations it is prohibited for Russian unmanned aircraft operators to operate within the EU. Regulation (EU) No 833/2014 makes no distinction between manned and unmanned aircraft.
How to conduct in a case, where a drone operator from Russia wants to conduct a drone show in MS. The application is issued by MS applicant, but every document they have provided us (including operations manual and risk assessment), indicates clearly that the actual operator is indeed Russian operator.
Under the sanction regulations it is prohibited for Russian unmanned aircraft operators to operate within the EU. If the competent authority has the grounds to believe that the actual operator is not the EU applicant but the operator from Russia, the application should be rejected.