Not just "digital" skills
Whilst the civil service is lacking in digital skills for reasons we know well (and which the CS is still doing little to address) there's an equally pressing matter of lack of applied commercial skills. Basic stuff like having a detailed understanding of the business model of the suppliers - how, where and when do they make money? Do they have a track record of fleecing customers in general and the public sector in particular? Making sure that public procurement rules don't result in an unsuitable contractor being appointed, procurement officers having the power to stop rushed contract awards when requirements haven't been defined (especially when some minister is pressing for a contract to be awarded solely so they can announce "progress". The civil service also need to both hold officials to account for failures, and recognise and reward those who are competent.