it is possible to run v2 modules, but it depends on your configuration!

check v3-specific settings:
# show running-config v3-specific
No V3-specific settings are configured.

run command "allow-v2-modules" to enable support mode ...
>> the switch needs a reboot

see also from documentation:

Unconfigure all v3-only features before moving to compatibility mode.

If the v3-native configuration is not present, the device reboots with the non-v3 configuration and issues the following message:This command will save the running configuration and reboot the system with all V3 modules operating
in v2-compatibility mode.Continue (y/n)?

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