Yes. Tidal energy is renewable
The energy of the tides will not go away if we use their power to generate electricity. It is renewable in the sense that we cannot take away the source of the energy by using them (unlike fossil fuels, of which there is a limited supply.
Yes, tidal power is renewable. No matter what use we may make of the tides, we do not use them up. The tides will continue to ebb and flow, driven by gravitational forces.