30 years ago, when the Macs and PC were at the beginning it was a program named NortonCommander that was used to see what is on that disk, sector by sector. I'm not a Mac expert but I know the PC's. I do not know if the old NortonCommander could be used on your Mac, but it could be the answer to recover your wallet.dat
Try and find an antique NortonCommander (for DOS 3.x-5.x or for an old Mac) and with this you can recover your wallet.dat file sector by sector (stop writing on your disk new files, as these new files will overwrite your wallet.dat file).
Try asking here
https://www.thinkclassic.org/about a software that reads the disk sector by sector.
This is the software
https://www.google.com/search?q=norton+commander&client=firefox-b&tbm=isch&source=iu&pf=m&ictx=1&fir=GUO6AWDK_LU-PM%253A%252C2hHgOBvL7GfMhM%252C_&usg=__RBJNzUkv_TKNLya8ur_g-BD3eeY%3D&sa=X&ved=0ahUKEwj61_X3vafXAhUNGuwKHVsKBJIQ_h0IhgEwDg#imgrc=_this is the dump of a disk sector
https://www.google.com/search?q=norton+commander&client=firefox-b&tbm=isch&source=iu&pf=m&ictx=1&fir=GUO6AWDK_LU-PM%253A%252C2hHgOBvL7GfMhM%252C_&usg=__RBJNzUkv_TKNLya8ur_g-BD3eeY%3D&sa=X&ved=0ahUKEwj61_X3vafXAhUNGuwKHVsKBJIQ_h0IhgEwDg#imgrc=FQIjgFksVwc5qM:
this is where to get it for windows
https://www.winnc.com/download/this is where to get it for Mac
https://www.ghisler.com/download.htmhttps://alternativeto.net/software/total-commander/alternatives/?platform=macUpdate and edit:
A disk has a boot sector, followed by a FAT (file allocation table), follwed by the data itself. When a file is deleted from the disk, only the first letter of its name from the FAT is deleted. The FAT tells the disk controller where is the file located on the disk. Thus, if your file has not been overwritten, by reading the FAT of the disk you can recover the data.