Can a situation of poverty be a symbol of silent protest?

As a general rule, Yes. But this is from the perspective of the observer, a Catholic historian or sociologist. How?

First, there is the contrary situation of affluence, the lavish lifestyle of the rich and powerful displaying a counter-image;

Second, the community’s lifestyle of simplicity, frugality, destitution, misery, limitedness, etc.;

Third, there is the consistency and sincerity and authenticity, decency in the poor lifestyle;

Fourth, there is joy and contentment in the community;

Fifth, the suffering community is constantly aware that they are victims or their situation is the result either of direct violence or the consequence of unjust laws, ordinances, projects, etc. of the unjust system of governance;

Sixth, they pray for the unjust victimisers and like the Crucified and Forsaken say, “Father, forgive them for they do not know what they do.”

Seventh, they end their day-to-day living like Jesus Forsaken saying, “Into your hands, Lord, I commend my spirit.”

Eighth, they look for the opportunity to be in solidarity with the poor on certain occasions like Church-organized public rallies, celebrations, etc.;

Ninth, they help in the material needs of the poor;

Tenth, most importantly, the idea of protest is not in their concept of the spirituality of the Crucified and Forsaken Jesus. Theirs is rooted in love for others, for all, including enemies.