Unfortunately, Buick does not currently make a hybrid SUV. Since 2020, the auto manufacturer only has one hybrid model on the market: the Buick GL8, which is only sold in China.
Otherwise, Buick only manufactures traditional, gas-powered vehicles as of right now. Prior to 2020, the company also manufactured hybrid versions of the Buick LaCrosse and the Buick Regal, both of which are significantly smaller than a standard SUV.
If you’re willing to compromise on a vehicle from a different brand, the Acura MDX Sport Hybrid is a great place to start. This SUV is comparable to the Buick Enclave, so it might be a nice compromise between comfort and eco-consciousness.