My wife and I have three separate accounts with the same bank - my account, her account, and our shared account. When I get an MFA request on desktop, I can't tell which account it's coming from because the institution is the same for all three.
I don't have this problem on the android app because the custom institution name I have set for each account in Settings → Accounts is what appears in the MFA request. This is just a problem for the web app.
Desktop:
Mobile: