Cases aren’t appealed because you don’t like the outcome; if there are no legal grounds for appeal (such as something wrong with the process of the original case, like concealed evidence) then there is no appeal granted.
I am quite aware of that. It is why so few appeals are traditionally granted.
But if you look at the number and types of federal appeals granted in the last 4 years, you can see legal grounds are EASILY drummed up. An objection sustained here, evidence excluded there, if a liberal does not like the outcome it is a very low bar.