It was reported by Bloomberg in 2022 that the ASA between Greece and India entered into force on May 11, 2022. They cite the Greek Official Gazette, Issue A, Number 154/2022 published on 22 August 2022.

Perhaps those whose Greek is better than mine can verify at the quoted source

https://news.bloombergtax.com/daily-...ers-into-force

This bilateral brief on the Indian Government website indicates that the Greek parliament only got around to ratifying the ASA on 15 March 2022