crossed_fingers: i there,
So , as per usual @msfujino is correct… 
If I may add, have a look at this code and thread on the Grove Expansion Board, It has a spot on the Bottom to Add additional Flash and I have done so. The Testing zcode would be helpful to you.
It tests both the Internal Flash, the External QSPI flash and the Solder-in Flash chip. I did both Nrf52840 & ESP32C3 vastly different configs for the SPI’s
In the END i got it going with Excellent support from The seedineers, @Citric & @Seeed_Seraphina … Check out the complete flash testing Journey and it should be beneficial to you.
HTH
GL 
PJ 
So in reviewing your open, and Without any code posted I’m betting this link has your answer, it’s subtle…very subtle
You’ll get it just read everything and stay with it. 
also post the code if you can, use the code tags above “</>” and paste it in there. The SPI’s (including the QSPI) are slick and better than how the ESP32 monkeys doit. IMO.