"offers a wealth of" is correct and usable in written English.
You can use it when you want to state that something has a lot to offer. For example: This website offers a wealth of financial information.
That simple concept offers a wealth of possibilities.
This site offers a wealth of information, including grant opportunities.
The App Economy offers a wealth of opportunity.
The interface at the cell membrane and cytosol offers a wealth of possibilities for intermolecular interactions.
Manhattan's financial district offers a wealth of history for the real estate-inclined tourist.
But, art apart, Glasgow also offers a wealth of places to eat and drink and explore.
It's simple and easy to learn and offers a wealth of action and weapons.
And the major's secret affinity for handsome boys offers a wealth of opportunity to enterprising blackmailers.
Social Lives offers a wealth of information on recruitment and retention of social workers.
"During the course, I discovered that the art market offers a wealth of opportunities".
From its fertile north to the mountainous south it offers a wealth of travel opportunities.
