According to Portugal News some restaurants are going to start charging for ice and/or crockery.

https://www.theportugalnews.com/news/2023-09-01/are-you-being-charged-for-ice-or-crockery/81011?src=newsletter-04/09/2023&utm_source=The+Portugal+News&utm_campaign=12b c7ff9cb-EMAIL_CAMPAIGN_2023_09_04_09_48&utm_medium=email&u tm_term=0_dc8d1864be-12bc7ff9cb-%5BLIST_EMAIL_ID%5D

That isn't what it said, not new just some Lusa article on laws. Crockery related to people bringing own food to restaurant like for party.

Some restaurants, not only in Portugal, charge if you bring in a cake for instance, but also if you share a dish but want two plates and cutlery.
Charging for use of crockery and cutlery used for outside food, or for sharing a one person dish between two seems fair to me.
They have to bring those items to the table, clear them up, wash them etc, all costs money, and times are tight.

I wasn't aware that some customers bring their own food to a restaurant and that restaurants allow it.

People do bring things like birthday cakes etc into restaurants - also their own wine sometimes. The restaurant is perfectly warranted to charge for serving those sorts of things. For wine its called 'corkage'. Some restaurants do not charge corkage - and when that's the case it is prominently highlighted on the websites/menus because it isn't the norm.