[BUG] App should mention older posts from other servers are not shown

[paulmelis]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

When viewing an account on a different mastodon instance in the iOS app you're not notified that older posts might not be displayed, as the web view does.

Example: I was looking at @[email protected] on iOS and saw only two posts, while the account stats says "253 posts", and I couldn't figure out the discrepancy. Then I looked at the same account in Firefox on desktop and below the same two posts it clearly says Older posts from other servers are not displayed [Browse more on the original profile](https://mastodon.social/@Mastodon). That message really helps in avoiding confusion, but the iOS app doesn't show the same message, which isn't great.

Expected Behavior

Clearly show the same message on older posts on other servers in the app

Steps To Reproduce

No response

Environment

- Device: iPhone 13
- OS: iOS 
- Version: 16.6.1
- Build: v2023.13 (348)

Anything else?

No response