@Robertof ab @felmue, thank you very much!
Now everything works!
I finally understood what was going on... I did some tests and then I managed to put an address in one module, then in the other and then I can access both at the same time. One of them was at 0x32 and the other at 0x33. I need 4 relays for my project... now the conditions acquired by a BME688 will change the states of the relays.
You helped a lot, not only to solve my problem but also to understand the process.
Success and health to you all!