Yes. That's another feature we added together with Silent Payments. Wasabi has a Donate button that allows users to donate. The address is: sp1qq2exrz9xjumnvujw7zmav4r3vhfj9rvmd0aytjx0xesvzlmn48ctgqnqdgaan0ahmcfw3cpq5nxvnczzfhhvl3hmsps683cap4y696qecs7wejl3