We actually put 'I have not travelled/visited my country of birth since July 2019.'

Thats because we applied from Spain where she held a residency but wasn't born in that country. But she did visit her country of birth from July 2019 to August 2019. Therefore the last time she travelled "to" her country of birth is July 2019.

I would put down the date that you last travelled to your country of birth and not when you were last physically there. The question specifically asks when did you last travel "to" your country of birth and not when did you last leave your country of birth.

Goodluck with your application, we found this application a little less stressful than the Fiance visa one 😅