As I said in the comment I posted, you'll need to get two doses of EMA-approved or WHO-approved vaccine (or, if you lack your booster, get at least the booster as an EMA/WHO-approved vaccine) as stated by the official travel site
Sputnik V is in neither WHO's list (read the Status of assessment column for the list) nor EMA's list so you are actually considered unvaccinated in most EU countries
Exception can happen, but for touristic reasons they'll basically never happen