If there's no MEAT (Monitor, Evaluate, Assess, Treat), the problem was not addressed during the visit, and should not be coded.
"Coding professionals should not assign codes based solely on diagnoses noted in the history, problem list and/or a medication list. It is the provider’s responsibility to document that the chronic condition affected care and management of the patient for that encounter." --AHA Coding Clinic Q3 2021
If any treatment was directed at either condition, then yes, code them separately. Documenting there was no treatement is considered addressing ("neuropathy stable, continue to monitor.") Indicating they are being managed by another provider is considered addressing ("retinopathy improving, followed by Dr. Smith at Earl's Eyecare-o-Rama.")