Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Chen Yang <cafferychen7850@gmail.com>’
  
  Suggests or Enhances not in mainstream repositories:
    Maaslin2
  Availability using Additional_repositories specification:
    Maaslin2   no   ?                                             
    ?           ?   https://bioconductor.org/packages/release/bioc