It was interesting to note that there were several openings over the last few days on 144 MHz between the Caribbean and South America.
The map above shows the 5155km path that was open on 144 MHz between Aruba and Argentina.
P41E 144300 LU8FLB 00:59 20 Sep 21 Tep Argentina
The DX spot was most likely for a SSB signal and the propagation mode was TEP or Trans-Equatorial Propagation.
These are the FT8 spots...
Txmtr Rcvr Band Mode Distance Time (UTC)
FG4SU PY2OAL 2m FT8 4566 km 01:04:59
PY2BL FG4SU 2m FT8 4649 km 00:27:44
PY2OAL 144175.2 FM5CS 01:00 17 Sep 21 FT8 TNX 4300KM TEP Martinique
PT9FD 144174 NP4BM 00:47 19 Sep 21 FT8 GG27OR TEP FK68LM TU QSO Puerto Rico
PT9FD 144150 WP4KJJ 00:28 19 Sep 21 Q65C TU QSO GG27OR TEP FK68 Puerto Rico