They get performance royalties but it is at a lower rate. I think I’m some instances the non-songwriters make an even bigger contribution, imagine ‘My Shirona’ without the drum licks? The Band without Levon Helm?
I think the invidious example is The Animals - ‘House of the rising Sun’, Alan Price gets the ‘Trad Arr’ but the rest of the band are left in relative penury.
Ring Starr has done rather well through a couple of credits & performance royalties, net worth of over £200m, far richer than most.