typography Options (italic, normal) style is gone

Hi,
but from where? You have to be more specific.

If we talk about Helix based template - have you update to current one?
and tell me template name, please.

Have you, maybe by mistake, clicked update Google Fonts in Template Options ?

(I mean without having Google Fonts API)

Please share access to your website here (below)

Danke / Thanks

There are only those options which you see.

to get Italic style you have to use custom CSS.

OR

put needed phrase inside <i> here </i> (HTML)

OR

just use TinyMCE or JCE toolbar.

If we talk about Helix, probably yes.

But in general Italic - is not good/recomenned if you think about Accessibility, it's harder to read that text.

Italics are a known problem for some people with dyslexia and the general advice has been to avoid italics (particularly large blocks of italic text) and instead use bold for emphasis.

The British Dyslexia Association says:

Avoid underlining and italics: these tend to make the text appear to run together. Use bold instead.