Had posted this plant earlier on our group, few had written that it could be Alternanthera.
Seen at the Flower Show in Mumbai.
An ornamental hybrid Alternanthera is hard to identify to species level without much details.
However, this plant may be the same as in – https://toptropicals.com/pics/garden/07/52/P5255454.jpg which is marked as Alternanthera sp. in – https://toptropicals.com/cgi-bin/garden_catalog/cat.cgi?search_op=and&keyword_op=and&language=e&number=5&v1=seauser=tt&sale=1&first=26.
This website – http://www.natureloveyou.sg/Plants-A.html also shows a few cultivars.