Hi bud
New build SIP houses either have a block and render outside, or have an open top and bottom drained and ventilated cavity between the SIP and the back of a quality render carrier board (created using vertical battens), and then a modern thin coat render applied
Think you will struggle to get further comment to this, most experienced Renderers who have seen this sort of works know that the existing needs to be removed, the structure checked and maybe repaired, before a new render applied
Very much doubt that a re-render over existing will be suitable looking at the images… not too sure what that render is and the repairs are obviously hiding other problems….
Find a quality reputable render contractor near you and ask them for a review…. Be prepared for potential costs of repair to what’s behind rather than just a new render cladding