Assalamu Alaikum Warahmatullahi Wabarakatuh

It would depend on how they are made. Please contact Customer Services ask for clarification on whether the tuna and mayonise and sandwiches are made on separate (non-meat vegetarian) workstations or because they contain fish, would they be made with the meat workstations.

Relay this information to us for a decision.

And Allah knows Best,
Wa Alaykumussalaam Wa Rahmatullahi Wa Barakatuh