| Document and Entity Information | Apr. 08, 2024 |
| Cover [Abstract] | |
| Entity Incorporation State Country Code | DE |
| Amendment Flag | false |
| Entity Central Index Key | 0001987221 |
| Document Type | 8-K |
| Document Period End Date | Apr. 08, 2024 |
| Entity Registrant Name | AMG Comvest Senior Lending Fund |
| Entity File Number | 814-01669 |
| Entity Tax Identification Number | 93-4109571 |
| Entity Address, Address Line One | 360 S. Rosemary Avenue |
| Entity Address, Address Line Two | Suite 1700 |
| Entity Address, City or Town | West Palm Beach |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33401 |
| City Area Code | (561) |
| Local Phone Number | 727-2001 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
