I work with this material quite a bit, and I can say you that it is many times great pain to accomplish good recovery with low-end equipment. And we do have induction furnance - without it, pyrometallurgy of PGMs and stubborn ceramics is nearly impossible to do conveniently.
You can go with wet route, but for this you need to strip the resin of the capacitors either by burning them (evolving very toxic volatile CdO as yellow fumes) or stripping with solvent like DMSO. But for thick resin coated ones this is rather tedious, and you need to do it one by one with knife or pliers. Very tiring, tedious job.
Then you need to dissolve the ceramics in boiling HCL (producing very toxic barium chloride leachate you need to dispose as very toxic waste + dissolved PbCd from the solder, yummy). You will consume liters of HCL to dissolve ceramics from just one kg of caps.
And in addition, many times you obtain insoluble residue of the ceramic, which is very painful to filter after foils dissolution in AR.
Better option for easier recovery is to smelt the ceramics. But for proper decomposition of ceramics, you need to go past 1300-1400 °C to liquify titanate ceramics with suitable flux - powdered silica. There are also other options for sure, but this is very convenient. You need to shot right ammount of silica to strike an eutectic mixture, because if you add little or overadd, you obtain very viscous, non-eutectic slag which will always trap the values inside. And it is hard to resolve it with addition of literally anything - one component will tend to come out as insoluble solid, which will in turn transform to an expensive nightmare rock
And after smelt, you obtain metallic ingot consisting of PGMs, mostly copper and solder - BiPbSnAg. Very tough to process this multicomponent dore - either in nitric (due to tin and platinum) or in AR (due to Pb and Ag forming solid chloride coating on the surface).
Very nice material in terms of PGM content, very stubborn to actually process. Every shortcut or lowering the smelt temperature will significantly lower the recovery of PGMs.
And on top of all this, you want to resolve Pt and Pd... Trust me, if you will be done with this whole torture, you wont be willing to fall into another rabbit hole without proper knowledge and equipment. Speaking as full time chemist with more than 9 years of professional lab experience.