I think it is just a depiction from a drama show. There are more sculptures of padalai (> tabla) in India and Cambodia. An ancient instrument is padalai, that was there throughout India for 2200+ years is clear.
Thanks to hi-res cameras in every mobile phone, and close to a billion of them, it will be good to take a look at all the available sculptures of musical instruments throughout the Indian subcontinent. We will have new data, on the origin of pre-violin with bowed strings (straight zither, curved zithers, harps, lutes, scores of drum types, wind instruments flutes, pungi (called *vayir* in Sangam texts) giving birth to nAgasvara, yaazh types, Veenas, ... Exciting days and years ahead for the history of music instruments in sculptures and texts!
BTW, Nagasvara Chakravarti T. N. Rajarathinam Pillai played the Mangala Vaadyam at India's independence day. He was the Tiruvaduturai Adheena Vidwan who went with the Mutt delegation to hand over the golden Sengol to the PM J. Nehru. Kumaramangalam Dr. P. Subbarayan's role in arranging this event is told by
Nagasvara Chakravartihimself to Sri. T. Sankaran (brother of T. Balasarasvati and T. Viswanathan, Wesleyan University) in an interview (J. of Music Academy, Madras) quoted by B. Kolappan in the latest article in The Hindu. Now there is interview by Tiru. Masilamani Pillai, PS of the T. Mutt head (by R. Pande, Chanakya TV). And, also see the interview by Dr. B. M. Sundaram quoted in: https://twitter.com/naa_ganesan/status/1664128223897083906 It is clear Lord Mountbatten was not involved in the Sengol handover ceremony in 1947. He just watched it in the Durbar hall of Parliament. I suggested that in the future, like the USA Govt., Govt. of India say after 10 or 25 years release a coin commemorating the installation of the Nandi Sengol in the Indian Parliament. The coin should depict the Lion Capital and Nandi Sengol on the reverse and obverse sides. See the US Govt. coin:
N. Ganesan