Can I compare this Ramadan with last Ramadan?

Yes, with two statements. Reports → Monthly statements keeps the most recent 24 months, newest first, so download the XLSX for both months and put the Daily sheets side by side. The numbers are real numbers with the currency in the cell format, so a formula works. Last year's statement never changes, because it reports what was charged at the time, and this year's keeps moving until the month ends. The Dashboard only looks back thirty days, so for anything longer the statement is the tool. The Reports & insights tab in the docs describes both sheets.