For anyone bothering.
There are bars around the port area, the Placa Commerciale, Rossio square and Rua Augusta are good for bars etc There is an English pub down by the river. I have also found in the past the Flamengo supporters club bar which sells craft ales and was quality.
A cab from the city centre to the ground is around 15 euros.
We are staying in an apartment near Oriente station in Lisbon on the day of the game as we are getting the 8-45am train up from Albufiera station.
I was over in Portugal last week and its mostly open, the Portugeuse are sensible and follow mask rules as you enter bars/ shops etc. You will need your vaccine certificate and have to fill in a passenger locator form. You need to take a test before going, but coming back a test is no longer required.