Is the past participle of post two words: post and posted?

No. Post is the only past participle of post. Post is also the past tense of post.

Use of position:

1, vt: posting, mailing, announcing, and setting up posts.

Can you post this letter for me?

Would you please post this letter for me?

2.n: post, post, post, column, pile and pole.

I'll mail the original to you.

I'll send you the original.

We will create 15 new jobs next year.

Extended data:

First, the usage of paste:

1, adj: well informed.

Let me know your progress.

2. make v: post (past tense and past participle of post); Announce, post and post.

It is normal to work in this country for two or three years before being sent overseas.

I usually work in this country for two or three years, and then I am sent overseas.

Second, paste related phrases:

By post: delivered by post office.

By post: by post.

When "post" means "mail", its synonym is: mail.

He sent me the contract.