In U.K. with Powerwall but I can’t work out gross import /export

I know this has been discussed before and I tried adding a post to an old thread about it, but the thread is “greyed-out” (?) so apologies for posting again. Having tried many and various options without success I would much appreciate some suggestions.
Basic problem is that I want to know gross import from grid and gross export on a daily basis and during the day but I either get no figures now as in “-“ or I get numbers that show PV battery charging as part of export and battery discharge as part of import. I am only interested in kWh rather than costs/income at this stage at least.
Would any kind soul be able to give me a simple guide to achieve what I want (assuming it is possible?)
I am a very appreciative user of PVO on my current and previous house since 2010. Many thanks to BB.
This is my current system :- https://pvoutput.org/list.jsp?userid=70042