My new gravel bike will have White Industries crank with 40/26 rings and 3T 9-32 11speed cassette (GRX dI2 shifting). This gets close to your low gear and still has a huge top gear. As a previous post said, the WI crank with variable BCD allows a lot of flexibility.
FWIW - we also ride a tandem and have 46/30 with 10-42 cassette (also GRX dI2). The 30/42 low gear is about 19 gear inch; top gear is 124 and we use all of them!