@Allan Jones is correct, but It is even more complicated with this model since the data on the SSD is also hardware encrypted. This means the Logic Board must be working in order to attempt access to the encrypted data on the SSD since the security enclave chip must be accessible and able to communicate with the system. Plus you must be able to be able to access external media to transfer the files which means the USB-C ports must be functional as well. This basically means the Logic Board needs to be nearly fully functional.
The only way to possibly access the data is to have the Logic Board itself repaired (assuming the security enclave & SSD are both functional...if either one is damaged or corrupted, then there is no hope of data recovery. A professional data recovery service may attempt this and there may be some unauthorized techs who can attempt repair of the Logic Board, but there are a lot of components on the Logic Board which are not available to anyone except Apple. Plus there are not that many techs that understand how to repair an Apple Logic Board. As soon as an unauthorized repair is performed, then Apple will not repair the laptop in the future.
Apple does work with a few professional data recovery services such as Drive Savers. It is my understanding that Apple should be able to send the Logic Board to them once you agree to a repair, then after Drive Savers finishes with their attempt at data recovery, then Apple will complete the repair by replacing the Logic Board. This is how it worked for us many many years ago. Ask Apple about how to process a repair where you first want to recover data. It is possible the Apple Store won't help you here, but perhaps an Apple Authorized Service Provider will do so since Apple assumes users are backing up their own data. Only Apple or an AASP can tell you how to proceed here.
As you have discovered, people should always have frequent and regular backups of their computer and all external media (including the cloud) which contains important & unique data.
