It is not about the gear, it's about security people that force you to disable IPv6. "You do not have a valid technical or business reason to use it. And, as electricians say, a VISIBLE circuit break provides the best assurance that this circuit will not kill you. Lack of IPv6, as opposed to just firewalling it, is the equivalent of the visible circuit break. I would also enable a whitelist of permitted ethertypes on all switches, and not include IPv6 there."

And let me quote from CIS SUSE Linux Enterprise 15 Benchmark v1.1.1 page 191: "3.1.1 Disable IPv6 (Automated). Profile Applicability: Level 2 - Server, Level 2 - Workstation."