I am unable to apply bold formatting to the font

I am experiencing an issue with IO Manager where the bold font function is not working.
Could you please look into this and advise on a resolution at your earliest convenience

What do you mean - where are you trying to include bold font?

If you are trying to use HTML in fields, this is no longer possible because it’s unsafe in multi-user environments.

But you are free to create custom theme which will allow it.