I had the same problem back in November and posted to the forum:https://www.linuxliteos.com/forums/on-topic/can't-see-my-book-marked-items/msg44646/#msg44646
what I put in there is still the same way I get to my bookmarks - essentially I have to book mark a new item then it will take me to my book marks. I was relieved to find out that all my book marks are still there
although it would be great if it would revert back to the "usual" way it worked before...