I’d love a Monzo LISA but I don’t believe they can offer one natively (yet) 
Monzo are authorised to run several ISAs & Junior ISAs but not LISAs 
https://www.gov.uk/government/publications/list-of-authorised-isa-managers/isas-authorised-managers
Hopefully in the future this changes 
but for now we’ll have to rely on other providers 