Well, you haven’t given us much info to work with, so it’s going to be very difficult to help.
ESP32 + wired Ethernet isn’t a common hardware combination, and does t leaned itself to the normal Blynk.begin approach. Without lots of info about your hardware and the sketch you’re using it’s impossible to say why using the regular WiFi connectivity approach isn’t working, but I’d guess that your sketch is the culprit.
If you want to use your ESP32 with hard-wired Ethernet then stare by reading these two posts…
If you want to try using your ESP32 with WiFi then disconnect everything from your board - except your USB power cable - and use one of the basic examples from the library. I’d avoid using the Edgent examples, just keep it simple at this stage.
If you need more assistance then provide all of the necessary info please.