Applying for a tourist visa with one passports then bringing another to interview?

[EternalForeigner 57]

A friend is planning to apply for a U.S. tourist visa though they plan renew their passport at the same time an interview might be made available. He lives in Canada and just got permanent residence there but his passport isn’t visa-free for the U.S. and in Canada right now appointment wait times for tourist visas are egregiously long, 700/800+ days. 
 

He might visit his home country briefly as appointments at U.S. diplomatic missions there have much shorter wait times, but his passport is close to expiring. His time will be limited and so he’s planning to fill out the application and try to make an appointment before he travels to his home country, but the application will have his current passport info, and wants to renew his passport as soon he gets there before the appointment. 
 

If he goes back there and renews his passport after filling the application and scheduling an interview appointment, but before the actual appointment takes place, would that be all right for the purpose of the application and interview or would it have conflicting info? I wanted to see if anyone filled an application and scheduled an appointment only to bring a renewed passport to the actual interview and if that went well or not. 

Edited April 12 by EternalForeigner

[MaxP22 186]

No personal experience but from searching online, if he brings the old passport as well as the new one, they should be able to make a note on his application at the interview and process it using the new passport.

[EternalForeigner 57]

3 hours ago, MaxP22 said:

No personal experience but from searching online, if he brings the old passport as well as the new one, they should be able to make a note on his application at the interview and process it using the new passport.

I kept hoping/wondering if this was anything they’d accommodate but wanted to see if there was anything against that that I might be missing.