I have heard about the SSS but the scenario you gave something different and it means the wallet have to be aware of these trusted users. Anyway your link was still helpful to get better idea of SSS, the take here is rather than using ledger or unknown third party, one will opt for their trusted friends and family, if I'm correct?
I kinda get what you are trying to say, but I must correct you. The wallet is not aware of anything it is not a living thing. When you create the secret sharing setup, you decide on the number of shards and the number required to re-assemble the wallet. For the last part, definitely only do it with either yourself or with trusted parties. Do not involve Ledger or third parties in this.
And all these will be done through the wallet like how proton mail/files operate and being signaled with time limit(days) if such access will be granted by the actual owner?
No digital services need to be involved, and this is more secure and reliable. I will give a simple example that is not optimized, but just it shows how it works. You create a 3 out of
35 sharding setup, you give 1 to your wife and 1 to your best friend. You keep
one of yours in a bank vault that stipulates should you be unable to access it for a few days, that your wife can enter. In this way, if you are in a coma or something like that your wife can get your shard, combine it with hers and with your best friend's shard to recover the wallet.