Coleman's current contract ends at the end of November after the friendlies against France and Panama.
Bale is yet to play a game since being forced off during the 3-1 Champions League victory over Borussia Dortmund on 26 September.
Meanwhile, Chelsea's Cole DaSilva and Chris Mepham of Brentford have been named in the Wales Under-21 squad for European Championship qualifiers against Bosnia & Herzegovina and Romania.
Bale was among the group of Wales players who attempted to convince Coleman to stay on after last month's 1-0 defeat to the Republic of Ireland had eliminated them from the World Cup.
However, the Wales boss has tried to avoid a club-versus-country row by assuring fans Real Madrid will have the final say on whether the former Tottenham star is fit enough to play.
Bale has been carrying out individual training instead, and on Wednesday posted a picture on Instagram of himself alone at Real's Valdebebas training ground, writing: "Good sessions this week".
"If they [Real] say he can play 10 or 20 minutes then great".
"We will tell them this is where he is and they will get data off us everyday like they always do".
"If they say he can play 20 or 30 that is exactly what will happen but we are just delighted that he is going to be involved in some capacity".
James Collins has bid an emotional farewell to Wales fans after calling time on his global career. In his four seasons he has won 10 trophies, including three Champions Leagues and a La Liga title.
"He has said if we're absolutely desperate he would come out of retirement - and it speaks volumes for "Ginge" he has given us that option".
The 34-year-old defender won 50 caps for the Dragons over a 13-year global career and he formed part of the squad that reached the semi-finals of Euro 2016.