From the Select warranty cover on used cars
2.2 We will not pay for the cost of repairing or replacing any Protected Part that suffers a Mechanical or Electrical
Failure as a result of wear and tear.
https://d3rvezpmgp265q.cloudfront.net/lexusone/lexgbenv11/select_terms_and_conditions_2020_tcm-3157-1893670.pdf
But as Colin subsequently posts, I think Lexus take a pragmatic approach to some of these 'failures' Whether this approach would continue with the Relax version (as it's a 'no cost' warranty) only time will tell ..