Many people are hesitant when it comes to public speaking and this is amplified when speaking at a funeral or memorial service is involved. It is a nice way to honour a dearly departed by delivering a eulogy or sharing memories, but it is not something that anyone should feel obliged to do. It is a very big ask.
Samantha often gets asked to read a eulogy on someone else's behalf and when doing so the person who has written it receives acknowledgement.
This may be an option for you if you need to plan a service for a loved one or friend.