I use ATC1441's UART flasher website: (https://atc1441.github.io/ATC_TLSR_Paper_UART_Flasher.html)
| NEBULAR | Flasher |
|---|---|
| GND | GND |
| VCC | 3V3 |
| SWS | TXD |
| NRST | GND |
Baud rate 460800, 3s wait
Connect -> unlock -> select FW -> Write
First try to use the TLSR_HS_BWY_35.bin file. If the tag won't refresh you should try to use the SSD version.