I call my LINE hidden list the 'graveyard of relationships'

This is the first time I've ever told anyone about that.

I've never really brought it up because I feel like it would make things awkward, but I am a little curious about how other people manage their LINE contacts.
I've seen friends scroll endlessly, saying things like, 'Hmm, [Name] isn't showing up... who was this person again?' so maybe many people just leave everyone there once they've exchanged contacts.

My LINE friend list, including family, has about 20 people on it.
I generally hide people I haven't been in touch with for years.
It's exhausting because every time I open the app, seeing acquaintances I've grown apart from makes me feel awkward or sad for no reason.

However, there are some friends from my school days whom I don't hide, for reasons like, 'We've grown apart now, but I want to feel like they're still close to me.' It's a delicate balance.

By the way, I don't block people very often (because it would be awkward if they ever needed to contact me for something), and if I do block someone, I don't want to see them anymore, so I delete them too.

I think that kind of feeling varies from person to person, so I'm a little curious about how others manage their lists.
It seems like many people block others as a way of periodically cleaning things up because they no longer need them.

On the very rare occasion that I need to dig a contact out of the graveyard, going to check my hidden list is quite a depressing task.
Former colleagues who quit years ago, people I sat with only once at a training drinking party, friends I've long since lost touch with—seeing a long list of them, including people I don't even recognize, just leaves me feeling drained.

Something memorable happened a few years ago.
When I attended a friend's wedding party, I ran into an acquaintance, Ms. A, whose LINE contact I had exchanged over five years prior.
However, Ms. A didn't seem to remember me at all; she greeted me with a 'Nice to meet you!' and started introducing herself cheerfully.
...It was a very awkward situation. As I listened to her recite the profile I remembered so well, I thought to myself, 'I completely missed the chance to say we've met before...'

Since it seemed unlikely I would ever see her again, I just played along, went home, and deleted the LINE contact she had given me long ago.
Because to her, I was someone she was meeting for the first time today, so it would be strange for my phone to have her contact info.

...I just wished I had the kind of personality that could have spontaneously said, 'We've met before! We exchanged contacts, remember?! Don't you remember me?' in a bright tone.