There’s a debate in the Project Euler community about whether people should publish their solutions to the problems. The official website has a policy of not allowing solutions to be posted or discussed, other than on the forum, with the exception of the first 100 problems.
I think this policy is overly restrictive, especially as the problems get harder. As with Advent of Code, often a single comment from someone discussing a solution can provide the missing link to something which has been stopping me from moving forwards. Sharing knowledge and insights is important - Euler himself published over 800 papers and generated 81 volumes of correspondence with fellow mathematicians.
The one thing I don’t do is publish the answers - you’ll have to compile and run my solutions yourself.