Here is the correct matching of the ISO 9001 Clause 8 extracts to the audit evidence:

Audit evidence: Three subcontract trainers who had delivered training were not approved as defined in procedure SA1 Supplier Approval revision 3.ISO 9001 Clause 8 extract: 8.4.1 ...shall apply criteria for ... external providers...(This clause requires the organization to control external providers, including ensuring their approval and competence.)

Audit evidence: A training programme for a customer was not documented as required in procedure TD 2 Training revision 2.ISO 9001 Clause 8 extract: 8.3.5 ...shall retain documented information on design and development outputs.(This clause addresses the need to retain documented information related to design and development outputs, such as a training programme.)

Audit evidence: One trainer had not recorded the damage to a customer’s training room wall caused by using sticky tape to hang training aids, as required in procedure TD 2 Training revision 2.ISO 9001 Clause 8 extract: 8.5.3 ...shall retain documented information on what has occurred.(This clause relates to retaining documented information on activities and outcomes, including records of damage or issues encountered.)

Audit evidence: Five sales orders had no record of having been reviewed to verify the ability to provide these courses.ISO 9001 Clause 8 extract: 8.2.3.1 ...shall conduct a review before committing...(This clause specifies the requirement to review and verify the organization's ability to meet customer requirements before accepting sales orders.)

These mappings reflect the specific requirements of ISO 9001:2015 for managing external providers, retaining documented information, and reviewing contracts.