A box whose west edge lies east of its east edge, west > east, crosses the antimeridian, as in
RFC 7946 ยง5.2: [176.8, -21, -178.2, -12.5]
covers Fiji. The services return that form, and every bbox utility reads and returns it.
MapLibre's fitBounds and the map's bounds option read it as is. Elsewhere in MapLibre, add 360 to
east, as LngLatBounds.adjustAntiMeridian() does.
A geographic bounding box as an array of four numbers:
[west, south, east, north].