The documents should say who installs. OFCI means the contractor installs. OFOI means the owner installs. If the note says only owner furnished, ask.
Example: a gym equipment section lists a scoreboard as owner furnished. The spec does not say who mounts it. The bidder sends an RFI.
Leave the material out of your price. Price the installation only if the documents assign it to you. State your assumption in the proposal.
Takeoff Tool flags items marked owner furnished or by others. A person approves, corrects or excludes each flagged line.