India says it has achieved key milestones for the 2028 launch of an Indian Space Station to join the ISS and Tiangong Space Station.
India says it has achieved key milestones for the 2028 launch of an Indian Space Station to join the ISS and Tiangong Space Station.

Why successful de-docking of SpaDeX mission is a huge milestone for ISRO?

Indian media isn't exactly reliable when it comes to India's space program...
Its the ISRO (Indian Space Research Organisation) who've said this, and they've a pretty good track record of achieving stated goals.