Amjad has solved the the issue. (Passive Voice)

The issue have been solved by Amjad

The issue has been solved by Amjad

The issue was solved by Amjad

The issue will have been solved by Amjad

All are wrong

Active Voice: Amjad has solved the the issue.

Passive voice: The issue has been solved by Amjad

Passive voice formula of Present Perfect Tense: Object + has/have + been + past participle (V3) + (by + subject)