Replace oven cable buried under insulation ?

2002 built dormer house. Looking into replacing the kitchen and have one or 2 queries related to the electrics. About 5 years ago we had loose fill insulation pumped in to the crawlspaces and attic. The main board is at the very back corner of the house in the utility so all electrical cables lead to this via the crawlspace at the back.
AFAIK the cables are simply clipped onto timber running along the floor of the space and into the board below the ceiling. I mentioned this to the insulation installers but the cables were subsequently buried nonetheless.

I am now hoping to upgrade from a single to a double oven and was wondering if I should have a new cable pulled through from the oven switches to the board and fixed above the insulation in a suitable conduit or will the original cable be sufficient? The run is about 3 metres