Picture messages not being delivered

I have a Samsung Galaxy Note 10+.  I use the Verizon messaging text app.  Most of the people I text receive my picture messages fine.  However everytime i send my cousin who is also on Verizon on an iPhone, my picture shows Sent and then a day or two later Failed and she never gets it.  She gets my regular texts.   Today,  another friend of mine on Verizon did not receive 1 pic I sent and it just shows Sent on the status.. however yesterday  that same person did get a bunch of pics I sent (and they all show Delivered)  I do not want to reset my app and lose text messages.  I think this is a network issue.  . Help!

Pestañas (3)