Hello,
01. You can change the font by means of the Advanced typography option, which allows you to choose the item from a drop-down or insert your Custom CSS class. Please navigate to the Theme Settings > Typography > Advanced Typography.
Here is the documentation providing more detailed instructions: https://xtemos.com/docs/woodmart/advanced-typography-settings/
02. It is possible when you set for the “Accordion state” field to the “All closed” option via Theme Settings -> Single product -> Tabs: https://monosnap.com/file/Wyg3SzVI0W8kEqpCNmByUkGKtjp8j5
Try to use the theme preset feature of our theme for mobile devices, and choose this setting in the theme settings. You need to choose the custom condition and choose “Is mobile device”.
Here is our documentation on how to use theme presets. https://xtemos.com/docs-topic/theme-settings-presets/
Best Regards,