The Coral Edge TPU has approximately 8MB of SRAM for model weights/parameters.
https://coral.ai/docs/accelerator/datasheet/
It does not have VRAM as it is not a graphics card :)
There are examples and instructions for exporting Yolo variants to run on the Edge TPU:
https://docs.ultralytics.com/guides/coral-edge-tpu-on-raspbe...