I've not tried their Diaz, but some of their Clonaz and Etiz that I've had was a lot chalkier, and just seemingly just more cheaply made.
Wedinos tested them as good though, and
@steewith2ees also thinks the brand is fine, just that it is produced in less developed countries.
Which may account for the seemingly lower quality, which might make one suspect counterfeit pills, even though that may not be the case.
TL:DR I wouldn't choose this brand as my first choice if I had a choice. But then again if I get sent them again I wouldn't be too concerned, as long as they seemed to look and taste the same as the previous batch which tested OK.
EDIT: I've just seen on their official site that they dont list 1mg Etiz, any strength of clonaz, or 10mg of Diaz, as featuring among the products that they produce.
So either this confirms that any of the above pills are indeed fakes, or that their website is not updated to include any pills they may have started producing more recently. The copyright year on the bottom of their site is 2020, so it could well be that they just haven't updated their website.
(Note to mods, the Elikem website appears to be informational rather than a source for buyers, so I don't think I'm breaking any forum rules by mentioning it.)