Is it possible to format a Linux Flash Drive in Windows 10?

The USB drive may not be readable under windows but it can be formatted. As it may have many partitions I suggest you use diskpart
Open a CMD window as administrator and type:

diskpart
list disk (it will list all drives. Identify the USB drive number)
select disk n (replace n by the USB drive number obtained with list disk)
clean
convert mbr
create part primary
select part 1
format fs=fat32 quick
assign
exit (to exit diskpart)

I keep some LiveUSB Linux bootable Thumb drives on hand, biggest issue is the Windows can't see the formatting of Linux, gives these messages when drive is plugged in:

Berton said:

I keep some LiveUSB Linux bootable Thumb drives on hand, biggest issue is the Windows can't see the formatting of Linux, gives these messages when drive is plugged in:

The second error message says why, so I do not see why you consider it an issue. Windows does not natively support Liunx formats, so it is quite reasonable to give an error message like above isn't it?

cereberus said:

The second error message says why, so I do not see why you consider it an issue. Windows does not natively support Liunx formats, so it is quite reasonable to give an error message like above isn't it?

I don't consider it an issue, just pointing out that some will have to recognize. I have a Linux Desktop and Linux Notebook.

Berton said:

I don't consider it an issue, just pointing out that some will have to recognize. I have a Linux Desktop and Linux Notebook.

Ah ok - your text was ambiguous though.

cereberus said:

Ah ok - your text was ambiguous though.

I just didn't want to classify it as a warning for those users unacquainted with Linux and those not around with DOS.

F22 Simpilot said:

DiskGenuis?

You might be interested in Ventoy.

(HAHAHA King Friday... I haven't seen that puppet crap in decades. I was all into GI Joe and Thundercats)...

I think you mean Thunderbirds