There’s quite a few threads about deep sleep, but this one has lots useful info.
I’ve not re-read it, but I recall that there’s a way to hack the library to get faster connections to the Blynk server, as there’s a 5 second delay if you don’t. Not sure if this applies to the latest versions of the library.
An alternative is to use the API to do updates, which has been discussed a few times.
The YouTube channel by “the guy with the Swiss accent” (Andreas Spiess) has a couple of videos where he’s done test on various ESP8266 and ESP32 boards to check power consumption and how well they lend themselves to low power situations.
Pete.