What consideration it will give to extending the smoking ban to include doorways and entrances in (a) public and (b) residential areas.

It is already an offence to smoke in enclosed entrances and doorways.
The Scottish Government is progressing planned legislation on introducing a mandatory smoke-free perimeter around hospital buildings to prevent people from smoking around doorways and entrances to hospitals. Our Tobacco-Control Action Plan 2018 includes a commitment to ensure that communal landings become smoke-free. In addition we will also explore with local authorities and housing associations the idea of tobacco-free clauses in tenancy agreements and smoke-free housing alternatives being offered in social housing.
Whilst the smoking legislation introduced in 2006 was designed to reduce the negative impact of the practice in enclosed public spaces we have, in recent months, written to retailers requesting that they ask customers to refrain from smoking whilst queuing to enter premises for the comfort and safety of others.