@Boylesway exactly what I asked you to describe.
What was your setup before, yes I do expect you to describe it even if you think it's irrelevant.
What do you expect to use in your new setup, yes, I do expect you to describe what you want to end up with even if you think it's obvious.
Written communication is very difficult to interpret, the situation needs to be spelled out for others to understand what the situation is and what the problem is that people are seeking to solve.
I may well be able to guess most of this but there's no way I'm going to risk confusing you with incorrect information if I'm wrong.
For example there is probably a box installed on your wall where there wasn't one before (or maybe there isn't in which case I have no idea what's going on) and I'm pretty sure that these devices can behave differently with different providers in different countries. Unlike in Australia where they are all from NBN Co., and AFAIK so far, all behave the same.
Also I suspect there are things I don't know for sure, which we will need to address to others in the forum, such as whether those WAN/LAN ports on the Deco unit you posted a photo of will auto-detect the presence of internet as is the case with other Deco units.