New tape recorders fall into two categories.
1. Designing and manufacturing a completely new reel to reel tape recorder.
2. Taking previously made models rebuilding them from top to bottom while potentially redesigning the electronic circuits to new specifications.
Ballfinger of Germany was first out of the gate to design and manufacture a completely new tape recorder. As of early 2021 this company has 3 models in their lineup.
Metaxas and Sins have recently released a new tape recorder that will be produced in limited quantities.
Revox and Thorens have made plans to do so, having produced prototypes but have yet to release any production models.