it was pointed out to me that only my income was submitted to the Federal IRS.
Who pointed this out to you? What tax year are "they" referring to? What tax year are "YOU" referring to? If "they" are looking at a 2018 transcript and "you" are looking at a 2019 tax return, then obviously the numbers won't match up. So check that.
The reason that's not possible is because an official IRS transcript does not break down a joint return to "his" and "hers". However, I do have a few suspicions here.
If one of you file as Married Filing Separate, and later filed another return as Married Filing joint, then the joint return "HAD" to be mailed to the IRS, as it would not be possible to e-file it. So the mailed joint return may not be processed and entered into the system for months - possibly not until next year as far behind as the IRS is due to COVID.
