Elite Dangerous is not the kind of space simulation game where you can have one of your other ships lock onto yours and follow you.
The reason it's not that kind of game is not because of any philosophy that some will try to superimpose over it in an attempt to dictate "what it's about", nor yet because previous games in the series did not have this feature, but simply because it's something that either wasn't considered, or wasn't prioritised, or was decided against.
However, Elite could be the kind of space simulation game where you can have one of your other ships lock onto yours and follow you, if the game designers haven't already decided against it, and are willing to consider, approve, and prioritise the feature development.
That's where the "Suggestions & Feature Requests" part of the forum comes in. Ultimately, when any of these suggestions or feature requests is agreed to and developed, Elite becomes a somewhat different kind of game than it was before, to varying degrees.
For example, prior to Horizons, Elite Dangerous was not the kind of game where you could land on planets, and currently it's not the kind of game where you can land on atmospheric planets, yet that too may change.
Also, Elite is not other space games, and therefore cannot and must not resemble them in any way. If you want to suggest something along the lines of what you consider to be a good feature in another game, which you think Elite could benefit from, then rather than look to this game's improvement and benefit, you should instead just play that other game to make use of that feature, and not make use of the Suggestions & Feature Requests forum to taint the air with the breath of your blasphemy.
I hope you're now properly educated as to the unwritten rules of the suggestions forum, and the "what Elite is really about" dogma, which is always framed in the objective sense in order to exclude your subjective impressions of what the game is about for you.