The phrase "were stuck on" implies being unable to move forward, progress, or find a solution. There are several antonyms for this phrase, including "moved on," "found a solution," "overcame," "resolved," and "unstuck." These antonyms signify that the original problem or obstacle has been overcome, and the individual or group involved has progressed towards their goal or objective. In order to move on from being stuck, individuals may need to seek advice, brainstorm solutions or alternatives, re-evaluate their priorities, or simply take a different approach. It's important to remember that being stuck is not permanent, and with determination and ingenuity, any problem can be resolved.