One of the common leaks from that area is the gasket between the pump housing and block. To change this requires sump removal - not the end of the world but quite a bit of work - both crossmembers off to access all the bolts. These hold 2 of the 4 engine mounts but thankfully on the gen 5 no suspension or steering parts. The ones I've come across, all the fixing bolts are loose but tightening them doesn't stop the leak as the gasket will have been damaged by the oil leakage.
If you're lucky it will be crank seal, pump seal or the gasket between the pump and pump housing - this is a special round rubber seal available from TCB or Toyota. These can all be changed without removing the oil filter housing or sump.
IMO - buy all the gaskets ready, take the covers off and investigate exactly where the oil is coming from. If it's not coming from the back of the oil pump housing then just torque down the fixing bolts and change the remaining seals / gasket. Don't be tempted to use silicon / instant gasket - it won't hold back the oil pressure.
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