Terraform cannot use target_id with for_each loop

We have this code for Storage Accounts creation:

resource "azurerm_storage_share" "storage_account_shares" {
  for_each             = var.storage_share
  name                 = each.value["name"]
  storage_account_name = replace("${var.resource_name_prefix}${each.value["account_name"]}", "-", "")
  quota                = each.value["quota"]
  enabled_protocol     = each.value["protocol"]
}

Now I need to create diagnostic settings for each storage_share:

    resource "azurerm_monitor_diagnostic_setting" "storagemain_logs" {
  for_each             = var.storage_share
  name       = "storagemain-logs"

  target_resource_id = azurerm_storage_share.storage_account_shares.id
  storage_account_id = azurerm_storage_account.storage_accounts.id

  dynamic "log" {
    iterator = entry
    for_each = local.storages_categories
    content {
        category = entry.value
        enabled  = true

        retention_policy {
            enabled = true
            days = 30
        }
    }

I don't understand what I should put in "target_resourse_id" to have it interactively work with "for_each" block that I have in storage_share resource. I tried this variant, but it didn't work:

locals {
  storage_accounts_output = {
    id   = [for i in azurerm_storage_share.storage_account_shares : i.id]
  }
}

and then added target_resource_id = local.storage_accounts_output.id[index]

You need to use the each.key value to refer to instances of storage_account_shares resources, like this:

target_resource_id = azurerm_storage_share.storage_account_shares[each.key].id

Alternatively, you could use the for_each chaining method described in the official documentation by modifying your code to look like this:

resource "azurerm_monitor_diagnostic_setting" "storagemain_logs" {
  for_each   = azurerm_storage_share.storage_account_shares
  name       = "storagemain-logs"

  target_resource_id = each.value.id