Hello,
We always recommend you to make the customization to the child theme then you will not lose them after updating the theme.
And we recommend to take complete backup of the website before updating.
I have visited your website and it’s working absolutely fine on my end. Please clear cache and check back.
Video for Clarification: https://jmp.sh/VuGKy3T
Screenshot of mobile view: https://ibb.co/CmS203s
If you are trying to ask anything else then please provide with screenshots of the specific area to check it myself and help you out accordingly.
Best Regards.