NO
ATC ignores any flight level set in the flight plan i used 29500 as an off top of head figure the plane can reach 30k but it cant reach 36k which is what it was assigned even though 30k was set as cruising alt and the plane is incapable of reaching 36k
and the navlog is my point whatever i enter in navlog is ignored and it directs me to climb to max alt of plane or higher