Currently, the spo list get command does not provide the ability to select specific properties to be retrieved,

Proposed approach -
Add a option "-p --properties" to the spo list get command.

• This will give the ability to fetch the list properties that are not returned by default in response.
• Useful in scenarios like : find all lists with unique permissions using the property 'HasUniqueRoleAssignments' which is not returned as default in response. (Reference : New sample script: Get All List Items with Unique Permissions #2283 )

If the above approach sounds right, I would be happy to try and implement it.