No. v6 covers Frame Relay and older protocols that are no longer tested. Do not waste time on v6 materials.
Some courses may allow limited offline viewing of certain content via official mobile applications, though this varies by region and instructor. ccna v7 curriculum offline download
CCNA v7 is mature, but Cisco releases minor updates (v7.02, v7.03) to fix errata or add Wi-Fi 6 content. Your offline download must sync periodically. but Cisco releases minor updates (v7.02