In addition to this, the current version of radvac was designed to be more robust to mutations on its own. Specifically, it targets some non-spike/RBD parts of the virus, which are more evolutionarily conserved. And of course simply having an immune response to a different part of the virus than the large population of mainstream-vaccinated people is itself helpful, since mutations will be selected to circumvent the most common immune mechanisms.
In addition to this, the current version of radvac was designed to be more robust to mutations on its own. Specifically, it targets some non-spike/RBD parts of the virus, which are more evolutionarily conserved. And of course simply having an immune response to a different part of the virus than the large population of mainstream-vaccinated people is itself helpful, since mutations will be selected to circumvent the most common immune mechanisms.