MicrosoftKanwalNo1 , as a comment I'd don't use the term Dynamic Arrays Functions. More correct will be dynamic array formulas, spilled array formulas and legacy array formulas. With introducing of first ones Excel was expanded with new functions to support more effective dynamic array formulas. But thta doesn't mean older functions don't work with within dynamic array formulas - most of them works. Arrays were in Excel for a long while, just dynamic arrays makes work with them much easier. More close to your case,
=ROUND(SEQUENCE(4,1,PI(),1),2)works fine.
In your sample it's not clear what FILTER returns, an array from one element or with few values. And for all formulas shown, for U6,U7 and U8 you deduct R6 and T6 (not R6-T6, R7-T7, etc), thus the result looks correct.