I forgive myself because I was young, but when my dad was sick, I had deleted a bunch of voicemails and text messages about 8 months before he died. He had recovered so well from previous surgeries I guess the thought of him dying was an impossibility. My sister and I had found some old voice recordings from, I think a Nintendo something or other. The quality is so bad it's hard to tell who tf it is, but aside from family videos that's all I have of his voice.

I hesitate to say anything further because I doubt you were asking for opinion, but I'm not sure it's wholly troublesome to engage with these tools in the short term. Grief is hard as you probably know, possibly one of the toughest long term emotions to cope with. I think only time will hopefully allow here to cope in a healthy way. I think I might have done the same at the time had the tools existed back then.

Also I think my voicemail box fills up at 20 messages, after that Verizon want's my money.