Not posts, your workouts - the analysis page that’s generated for each workout you do. For example here’s my workout from Monday - https://www.trainerroad.com/app/career/bobw/rides/73885413-bashful-1 and here’s someone else’s Ansel Adams -2 https://www.trainerroad.com/app/career/simfro/rides/73967481-ansel-adams-2 If I replace “simfro” with “leestorer” I should be able to see your workout but I get an error pages stating that you’ve requested it be kept private.
Go to your home page, then Account and make your profile public. (I can’t remember if it’s public or private by default)
Edit: According the British Cycling HR zone calculator - https://www.britishcycling.org.uk/membership/article/20120925-Power-Calculator-0 - an upper value of 131 for zone 2 would put your FTHR at 159bpm