Can I find iPhone serial number if I only have IMEI number?

By the way if you have another iPhone or iPad you can look at the device info in Settings, your name and tap on the device. This is explained in the Related Article

Find the serial number or IMEI on your iPhone, iPad, or iPod touch

No.

I guess you lost the phone?

Do you have the box or the receipt?

How do you have the IMEI but not the serial number?