People will tell you to "find your voice", as though it were filed away somewhere waiting to be found. It is already in your last twenty posts. The work is not to invent it: it is to notice what you already do without knowing, and to stop contradicting it.
A voice is not an intention, it is a sum of regularities. Sentence length, punctuation, the choice between the concrete and the abstract, how often "I" appears, a taste for examples or for principles. You already have every answer, written down.
Extracting it yourself, in an hour
Take your last twenty posts, paste them into one document, and look for five things. It is tedious and it works.
"Eighteen days to answer a candidate is nine too many."
Where people contradict themselves
The commonest mistake is not writing without a voice. It is having one and borrowing another on the day you decide to "write a proper post".
Someone who normally writes in short factual sentences suddenly publishes a three-hundred-word personal story with a life lesson at the end. It gets a tenth of the usual reactions, and the author concludes their audience does not like stories. In fact, the audience did not recognise them.
On the Author plan you provide a sample of your own posts. Drafts are then written from your regularities rather than from a generic tone, and the sample stays attached to your account, feeding nothing else.
What to do with all this
Nothing spectacular, and that is the point. Once your five regularities are written on a page, you have a checklist: before publishing, check that the post sounds like you.
What you will mostly notice is how often you were about to publish something you would not have written: a decent post, but one that could have come from anyone. That is what a voice prevents, and it is already a great deal.