This may not help solve your issue, but if others are like me I have an interest and desire to play many more TTRPGs titles than I could ever find the time or money for. Even if a quality title is on sale I have to sometimes stop myself from purchase (for budgetary reasons) by asking myself "can find the time/other players to play this with?". Finding players for non-AAA titles can be difficult Your title may be getting views and interest but not purchases for that same reason.
The cyberpunk-noir combination could also be a double edged sword. It is a unique concept which could garner interest, however, it is possible those interested in the noir side of the coin are paused by the cyberpunk side or vice-versa? This is not a complaint about the setting, just a hypothesis. I received a publisher email mentioning your title going on drivethru which may expose your title to a different subset of the TTRPG audience. I hope that helps sales/exposure for you.