VOICELESS ASPIRATED BILABIAL STOP [pʰ]
VOICELESS LABIO-DENTAL FRICATIVE [f]
Pe with dagesh is pronounced similarly to English "p". Pe with rafe, which typically occurs after vowels, is pronounced similarly to English "f".
SOURCES AND FURTHER READING
Khan, Geoffrey. 2020. The Tiberian Pronunciation Tradition of Biblical Hebrew. Cambridge: Cambridge and Open Book Publishers. §I.1.17.