Loco translation -pot file missing? translation of child theme

Hello,
I just bought your theme two days ago and I am rally happy I did, everything seems to be working fantastic. Thank you.
1) In one of the topics here you replied “try using loco translate and translating the main theme”.  Does it mean that if I am working on the child theme activated and I activated Loco and did like a thousand lines of translation -it will not show up on my site? Do I have to go and activate the main theme instead for this to work?

2) On the Loco beginners’ guide page https://localise.biz/help/wordpress/translate-plugin/beginners in point 4, I read:

“4. Check the theme contains a POT file

Looking inside the Omega theme folder we can see a languages sub-folder containing a file called omega.pot. This is a translations template file provided by the theme. It describes what translatable ‘strings’ the theme supports. We know it exists for Omega, but check it anyway:

wp-content/themes/omega/languages/omega.pot
Just knowing this exists is good enough for us right now. It doesn’t need to be writeable unless you’re the developer of the theme.”

In my installation of sweed date and sweet date child, this file doesn’t exist (po file does for Polish). Is it going to work?

The translation I made is not showing, maybe because of the problem I mentioned above (lack of pot file)… There is another symptom I observed: once I press “synchronise” in Loco, I get a message: “Ok: connected to ro_RO.po 44 lines added” Why ro? is it because it’s the only pot file there is? (I don’t see it on the server but Loco seems to be detecting it)
Thank you beforehand for a fast reply.