To understand bundles not loaded

What difference made in bundles “active” or “not loaded” ?
I have a bundle not loaded
Jackcess “not loaded”
Jackcess (com.healthmarketscience.jackcess)
A pure Java library for reading from and writing to MS Access databases.

But it is working. I can create datasources to Access files through other driver ODBC.
So “active” status is not necessary ?
Thanks fo any information with this.

Don’t forget to tell us about your stack!
Linux debian 10
apache 2.4
Java : 1.0.15 (Eclipse Adoptium) 64bit
Java : 11.0.4 (AdoptOpenJDK) 64bit
Ucanaccess 5 (driver Lucee-Access mdb through JDBC)