I have a dental inlay and a filling bellow. is it bad to chew on it?

No problem: I am a little confused by your question. I assume you mean you have an inlay on a tooth in the upper arch and a filling in a tooth on the lower jaw? If that is so, there is no problem with that. That is a very common scenario.

Dental restorations : Your restorations are strong enough to eat normally. Treat these teeth well, with good brushing and flossing and your restorations will last a long time.

Restorations: Restorations, regardless of what type (inlays, crowns, fillings, etc) are meant to replace missing or damaged parts of teeth so that you can function normally, and in this case eat normally. Exercise normal caution. Your dentist should discuss restrictions, if any. If something doesn't hold up well, you need something stronger. Even natural teeth can chip or break if abused.

Dental inlay is safe: Inlay is a conservative method of restoring normal tooth structure. And unlike amalgam fillings, inlays do not weaken the tooth structure, but actually strengthens it. After the restoration is bonded, the tooth can bear up to 50 to 75 percent more chewing force and provide strength and stability for normal chewing.