Recently diagnosed with MCL with TP53 mutation

I was recently diagnosed with Mantle Cell Lymphoma with a TP53 mutation and have had 1st two infusions of Rituximab. I have an enlarged spleen and platelet count of 49,000. Just wondering if others have a similar scenario. I do not have any lymph node involvement and no symptoms other than loss of appetite and discomfort from the spleen. I was prescribed Calquence orally but was told to hold off until my platelet counts came back up.