This is what it should have. If you don't have this, then I'd ask Steam customer service to fix it.
Seasons 1–4 content:
Specialists (4 added in Year 1)
Base game launched with 10 Specialists. Elite adds these 4:
Lis (Season 1, Engineer) — Anti-vehicle focus with guided missiles.
Crawford (Season 2, Engineer) — Defensive specialist with deployable Vulcan cannon.
Zain (Season 3, Assault) — Aggressive playstyle with a new launcher gadget.
Blasco (Season 4, Recon) — Stealth/disruption expert with anti-electronics tools.
New Maps (4 added in Seasons 1–4)
Exposure (Season 1) — Mountainous terrain with verticality and weather effects.
Stranded (Season 2) — Coastal/shipwreck theme.
Spearhead (Season 3) — Industrial/military base setting.
Flashpoint (Season 4) — Urban combat zone.
(Base maps: Orbital, Hourglass, Kaleidoscope, Manifest, Discarded, Breakaway, Renewal.)
Weapons Added in Seasons 1–4
Elite unlocks these (roughly 10+ new ones mentioned in bundles):
Season 1: Ghostmaker R10, BSV-M, and others.
Season 2: AM40, PF51, Avancys, etc.
Season 3: Rorsch Mk-4, NVK-P125, NVK-S22.
Season 4: RM68, AC9, RPT-31, Super 500, and more.
These span Assault Rifles, SMGs, LMGs, Marksman, Snipers, and sidearms/shotguns.
Vehicles Added in Seasons 1–4
Around 6+ new ones, including:
YG-99 Hannibal
RAH-68 Huron
EBLC-RAM
CAV-Brawler
EMKV90-TOR
Ranger (and additional variants/skins)
Other Content
Battle Passes for Seasons 1–4 (cosmetics, XP boosts, etc., though many are time-limited rewards).
Additional Gadgets, Attachments, and Balance Updates from each season.
Lost World Epic Cosmetic Bundle (as mentioned before: Forsaken Rao set, Starved Vulture vehicle skin, Banisher weapon skin)