My only knowledge is based on the extended warranty offering from Volvo (but actually with Car Plan) after the standard 3 year warranty expires. The choice is an extension for a year to max of 60K or 80K miles
Details here:
https://www.volvocars.com/uk/own/mai...volvo-warranty
To be honest, I only half convinced myself that it is worth it (you only ever know for sure with hindsight). My general principle is to avoid the majority of breakdowns etc.. with sufficient care and maintenance.