I offer my condolences.
I've lost three friends or family members in the last six months. It's a sadness.

I belong to a loosely organized and very diverse social group. Years ago we lost our first member. Then others as time passed.

Each funeral was different.

At an informal leadership meeting the subject was raised of how we might handle future funerals.

One of our (to my mind) wisest leaders said something like this:

The way that individuals and also family/friends groups deal with grief and mourning can be even more idiosyncratic than politics or religion or social values.

And in courtesy untouchable by an outsider.

A departed person is being mourned. Good faith should be assumed. Expectations and judgments are to some extent out of place.
To some extent. How much of an extent?
Mourners should not distract or offend other mourners.
As usual – and pardon the expression in this context – the devil is in the details.