FAPE is primarily about instruction and access to curriculum frameworks.
LRE is primarily about settings, especially separation from the mainstream. This is why there are two primary signature pages on an IEP: one for the main plan (accommodations, goals, service delivery), and one specifically for placement, with the latter where one explicitly (in percentage ranges) defines and consents to the degree of separation from the general education setting.
So, hypothetically, a 2e child's FAPE could involve significant academic acceleration and remediation, but in a substantially-separate environment (very restricted). Among well-meaning districts promoting differentiation as the solution for GT students, the ideological balance prioritizes LRE over FAPE. Idealized GT schools prioritize FAPE over LRE. (Though these are rarely free or public.)
