Leverage the power of Swift 5.9 brand new Parameter Packs to adopt the Equatable protocol for use in SwiftUI's .onChange(of:) based on changes to multiple parameters!

EquatablePack.swift

struct EquatablePack<each V: Equatable>: Equatable {
    let value: (repeat each V)
    
    init(_ value: repeat each V) {
        self.value = (repeat each value)
    }
    
    static func == (lhs: Self, rhs: Self) -> Bool {
        func throwIfNotEqual<T: Equatable>(_ lhs: T, _ rhs: T) throws {
            guard lhs == rhs else { throw CancellationError() }
        }
        
        do {
            repeat try throwIfNotEqual(each lhs.value, each rhs.value)
        } catch {
            return false
        }
        return true
    }
}

/*
Usage example: 
.onChange(of: EquatablePack(value1, value3, value3)) {
    doSomething()
}
*/