The Short Version
The TFTA's core design intent — integrating COMESA, EAC, and SADC trade regimes to boost intra-regional trade — is strongly confirmed by the official agreement text, institutional announcements, and independent analyses. However, the claim contains two imprecisions: "merges" overstates the structural arrangement, as the three blocs continue to exist as separate entities under a coordinated FTA framework; and "Sub-Saharan Africa" is geographically inaccurate, since Egypt, a North African country, is a member state.