Can ChaRM keep its functionalities and its integrations with other functions and tools? For instances integration with SolDoc?

The main benefit of an integration with ChaRM is that you can continue using all features and integration scenarios of ChaRM. A SolDoc integration will therefore continue working as expected. However you must be aware of the fact that a Status Change triggered by Jira might be rejected by the SolDoc integration if there is such a validation configured.