If you mean ‘not a switching power supply’ here is my take. A switcher takes rectified ac and pluse width modulates it into voltage regulated DC. This thing just changes DC to ac.

Switch mode power supplies aren’t new ideas, either, and surprisingly pre-date the first commercially-available transistor although modern ones like these are much less expensive to build.

Global Switching Mode Power Supply (SMPS) Market was valued at USD 24.58 billion and is expected to grow at a CAGR of 5.3% during 2025-2030. The Switching Mode Power Supply ...

The Unique Challenges of Using GaN in Switch-Mode Power Supplies. A number of challenges emerge when replacing silicon MOSFETs with GaN power devices. These challenges relate to the requirements ...