I asked a couple of times to get infos how your disk is listed.
But you didn't give any info.
So I have no idea, does you start and size of your thumb drive and your LBA fit?
What I do not know is whether there is hope by writing something to the disk (for example trying to re-create a boot sector) that the hardware will behave differently. Maybe you have no experience of this type of problem.
Sry, after loss of data, I'll never suggest or write to a disk, that the disk will behave differently.
This has nothing to do with datarecovery but increasing damage.
Before you go to change anything, you must have a partition.
If you have no partition you will have no boot sector either.
Just an empty and not accessible stick.
Only refusing infos doesn't help as much.
Would be an idea;
If you have valuable data see a professional.
Checking your hardware, diagnose it using S.M.A.R.T. would be in any case the first.
If you experience read errors and no sectors are readable then it looks like yout pen drive is defective.
Just as long as your thumb drive is recognized correctly and the size also, you can have a try to recover data.
But in your case to have a try to access partition table didn't cause any read error but a message that there is no partition or an invalid boot sector.
Until yet I didn't get any piece of info about that.
Using partition table type Intel aligns created partitions on cylinder boundary.
Using partition table type none doesn't align anything.
So in both cases, the start and size is different.
Only if you catch the right partition you would be able to get your partion and data using TestDisk back.
That's why I made this effort.
But I didn't use Analyse and Quick Search etc.. until yet, because I tried to diagnose a boot sector.
As you can see both is different.
Intel didn't display any partition so there is no boot sector diagnose possible.
None displayed an Unknown partition where you added the partition type FAT32 and a boot sector diagnose was possible.
If partition recovery is not successful, then you can try datarecovery software.
But it looks like that you know the ropes better then I do!
Sry I can't help in your case.
Not to get any infos but suggestions didn't help as much either