Internal SSD and SMART status
Is [SMART being disabled] an issue I should be concerned with? Does it affect the speed or other functionality of this drive.

SMART is a monitoring and reporting tool.
From Wikipedia:

S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology; often
written as SMART) is a monitoring system included in computer hard
disk drives (HDDs) and solid-state drives (SSDs) that detects and
reports on various indicators of drive reliability, with the intent of
enabling the anticipation of hardware failures.

It has no effect whatsoever on the performance of your SSD.