In Jain Agamic view, brahmacharya means purity of conduct and control over sensual desire, especially restraint from sexual indulgence.

For a shravak who is unmarried, the practical observance is:

• Complete celibacy in body, speech, and mind
• Avoiding lustful thoughts, words, and actions
• Avoiding attachment, fascination, and indulgent company that increases desire
• Keeping strict discipline over the senses

For a householder, brahmacharya is generally taught as a vrata of restraint, while for monks and nuns it is a mahavrata of total celibacy. For an unmarried shravak, since there is no married duty, the correct Agamic spirit is to remain fully chaste until marriage, with purity and self-control.

In short: Unmarried shravak = celibacy is the proper observance of brahmacharya.

If you want, I can also give the Agamic definition in simple Gujarati/Hindi or list the practical rules of brahmacharya for shravak.