Yes - its sounds like Anteo has worked on the design of the...

Yes - its sounds like Anteo has worked on the design of the Anode in some way

If it was just a straight supply of Anteo X it should have read "by integrating" ie ...
"The team has optimised the anode design of a European Electric Vehicle (EV) company by integrating Anteo X"
instead they say "whilst integrating" - which sounds like 2 separate pieces (the anode optimisation and the AnteoX usage)

Also they say
"Anteotech is pleased to announce that ithas successfully completed production of the first commercial high silicon anode containing Anteo X"
rather than say perhaps "aided the successful production by adding AnteoX"

and

"... anode formulation and scale up was successfully transferred to a third party manufacturer"
which suggests that the anode formulation has been amended by Anteotech and Anteotech provided the knowledge back to the 3rd party manufacturer.

So yes you'd think we should get some clip of the ticket on the anode as well