Mackie is a weird one. On one hand he'll dikk ride marvel/disney and make comments like the seabiscuit thing, but on the other hand when it comes to entertaining the idea of his own solo, not an opportunistic bone in his body and, of all the excuses, he'll rationale that Evans would no longer be available if he had a solo and loves working with him too much... even though your dumbass came into the MCU as part of Evan's own solo movies... so why wouldn't he be able to appear in yours but you continue to be in his?
Not that i'm campaigning for a Falcon movie but just another mackie head scratcher
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