Would recommend the book 'Expecting Better' for research behind what to avoid during pregnancy, it's so good for being able to make your own mind up!
Pate - does it contain offal? Like liver? If so the reason for not eating this is that it contains vitamin A / retinol. Your baby can't process this so it's considered harmful - though I don't know how high the quantities would be. For this reason I decided to avoid..
But pate is also one of the foods which has a higher chance of listeria so was a double whammy for me but the listeria risk is fairly low level - just would be more careful if it's been sat out for a few hours!
Prawns - no reason to avoid, usual making sure they're cooked through, stored correctly, in date but otherwise no reason not to
Smoked salmon - is usually on a 'dont eat ' list Inc NHS for the listeria reason.
Listeria is a risk for everyone - but pregnant people, babies, elderly and immunocompromised people would struggle more with the effects. It's one I sort of feel it's worth being generally slightly more cautious about but not going crazy - make sure food is in date, stored correctly and if possible cooked (e.g. salami on a pizza). It's not common and but the effects can be pretty horrible
It's so personal but I've taken the approach that if I know where the foods from, where it's been stored etc I'm okay with it but if it's say at a buffet or past it's sell-by I'm leaving it!