In addition to what others have offered, let's be realistic. You're dealing with a phone circa 2019, and you bought it with the lowest level of storage available at that time. 64GB is simply not enough storage in modern times. Storage is perhaps the most important consideration and often the most overlooked thing people pay little attention to.
Today, new iPhones from Apple start at 256GB and go up to 2TB. Personally, I don't even think 256GB is enough, which is why for the last couple years, my new iPhones have been pruchased with 512GB. Once purchased, there is no way to add storage to an iPhone. So you are hamstrung with a phone without enough storage to meet your needs and that's not something you can fix, unless you delete a LOT of data off your iPhone. Technology keeps moving forward and as it does storage needs increase.
No one has ever come to this forum complaining they have too much storage on their iPhone. But they sure do come here complaining they don't have enough storage. The next time you buy an iPhone, pay more attention to the storage option you buy.