The stardust is a given. As for sunlight, all the energy including somewhat arguably geothermal (using the suns gravity to help form the earth and I guess radioactive material being formed by other stars) comes from the sun and gets converted into chemical energy you eat so you’re stardust animated by sunlight (mainly).
Yes it’s converted and stored solar energy and it is renewable if you wait long enough but not on any reasonable timescales for human society. The sun isn’t big enough to become a supernova but if it did I guess you could argue if you wait long enough the material would most likely form other stars a few times until the stellar era of the universe winds down which will happen with or without any beings extracting energy to perform work.