I am so very sorry. Of course you're not in the wrong.
I lost my husband during lockdown. His middle-aged children told me that they couldn't come because of health concerns and that they didn't want the only grandchild (an adult) to come, because it would be upsetting.
It would have meant a one hour plane journey, but the grandchild had travelled abroad during Covid and money wasn't a problem for them.
The only people at the restricted funeral were my cousins, my husband's nephew and friends. (The kids sent their mum to represent them. Her current partner dropped her off at the crem.)
This is the relevant part. My husband's funeral was on webcast. Unfortunately, one of the kids lost a middle-aged sibling-in-law on the same day as my husband's funeral.
Their partner insisted that they wanted me to watch the funeral on webcast. I don't know why, but I felt an obligation to do so. They also insisted that they wanted me to write a message from my husband to their sibling in the online Book of Remembrance. (They had never met! Nevertheless, I managed to write something.) All this caused me a great deal of stress.
It was clear that chunks of my husband's funeral had been copied. Fair enough. That's what happens.
Bear in mind that I was completely on my own. Had been since my husband's death. I'm putting a 'trigger warning here' for the rest in case someone else is in a similar position. [Trigger warning: discussion of heart problems.]
The night I lost DH, I tried to give him mouth-to-mouth. Completely forgot about CPR in my panic. The call handler talked me through that. I was exhausted by the time the paramedics took over. It made no difference.
During the eulogy for the partner's sibling, they referenced their previous health issues...including the fact that they'd "died" three times in a row and had been brought back three times via CPR. (This was a couple of years prior to their death.)
That was the last thing I needed to be listening to. I was already blaming myself for failing my husband and even writing this I'm trying to avoid getting flashbacks to that night.
The OP should not attend the family funeral. It's the last thing she needs. Believe me, I know.