You need to talk to your cantonal migration office to see if it's going to be possible. The Foreign Nationals Act says: "Art. 42 Family members of Swiss nationals 1
The foreign spouse and unmarried children under 18 of a Swiss national who live with the Swiss national are entitled to be granted a residence permit and to have their residence permit extended. 2
Foreign family members of Swiss nationals are entitled are entitled to be granted a residence permit and to have their residence permit extended if they are in the possession of a permanent residence permit from a country with which an agreement on the free movement of persons has been concluded. Family members are:
a. the spouse and the relatives in the descending line who are under 21 or who are dependants;
b. the relatives of either spouse in the ascending line who are dependants. 3
After a law-abiding and uninterrupted period of stay of five years, a foreign spouse is entitled to be granted a permanent residence permit. 4
Children under twelve are entitled to be granted a permanent residence permit. Art. 47 Time limit for family reunification 1
The right to family reunification must be exercised within five years. Children over twelve must be reunified with their family within twelve months. 2
The foregoing time limits do not apply to family reunification in terms of Article 42 paragraph 2. 3
The time limits for family members of:
a. Swiss nationals in accordance with Article 42 paragraph 1 begin on their entry or with the constitution of the family relationship;
b. foreign nationals begin with the granting of a residence or permanent residence permit or with the constitution of the family relationship. 4
A subsequent family reunification shall be authorised only if there are important family reasons therefor.
If necessary, children over 14 shall be consulted on family reunification." https://www.admin.ch/opc/en/classifi...index.html#a42
The full Act is given here - the relevant section is on pages 250-252. https://www.bfm.admin.ch/content/dam...ngen-aug-f.pdf
If your ex-husband refused to allow the child to leave at the time maybe the cantonal authorities will wave the 12 month limit - you can but ask.
If they refuse to grant her a permit then there is no other way to bring her to Switzerland I'm afraid. She would need to finish her schooling in Russia and then she could apply at a uni here for a Masters maybe. Or once she graduates she could start applying for jobs, but it's very difficult for a non-EU national to get hired here.