Four temperature SHT31 sensors on ESP32
Yes, reading 4 SHT31 is possible with an ESP32.
If you have the analog version, readout is quite trivial: you simply use 8 analog inputs (2 for each) to read the signal.
If you have the digital version, which has an I2C interface, you need to control each sensor's address pin separately to select the specific sensor you want to read. Otherwise, there will be an address collision on the bus.