Just typed “Add mode” on forum search, and found this in first 2 minutes. People asking for: Hardcore, rush, offline bots, air superiority, tank superiority etc
forums.battlefield.com/en-us/discussion/179363/request-classic-battlefield-conquest-mode
forums.battlefield.com/en-us/discussion/164627/add-the-classic-bf1-operations-as-a-separate-game-mode-to-bfv
forums.battlefield.com/en-us/discussion/183114/please-keep-rush-and-add-it-for-all-maps
forums.battlefield.com/en-us/discussion/171885/a-good-mode-to-bring-new-players-into-battlefield
forums.battlefield.com/en-us/discussion/180395/when-will-we-get-hc-mode-i-cant-play-this-game-without-it
forums.battlefield.com/en-us/discussion/116789/dice-should-add-two-things-to-make-the-game-perfect
forums.battlefield.com/en-us/discussion/175443/can-we-please-get-a-competitive-game-mode-for-battlefield-5
Offline multiplayer mode request
forums.battlefield.com/en-us/discussion/151928/tank-superiority-mode