Bold Lora font is not showing

Hi there -

On my website https://www.seaweednotebook.co.uk/, I use the Lora font selected from Customise > Typography.

However I have made the first line bold, yet it doesn't show as bold.

Is there any way I can make bold, appear bold using the Lora font?

The same happens when I use the Merriweather font.

Thanks in advance for your help...

Robin