What kind of feature are you missing? Where do you notice a shortcoming of PTB?

New update :D

Important

• Comment here or in the dev group what you want to work on so we can assign you
• Please copy the relevant part of the checklist from
• [FEATURE] API 7.3 #4236 to your PR and make sure to cover everything :)
• Please base your branch on the api-7.3-central branch
• If this is your first contribution, please be sure to read the contribution guide and feel free to reach out with any questions via https://t.me/pythontelegrambotchannel/105

Describe the solution you'd like

• Added support for InlineKeyboardMarkup with url, login_url, and callback_game buttons for messages sent on behalf of a business account. @Bibo-Joshi Api 7.3 docs #4246
• Added the field via_join_request to the class ChatMemberUpdated - Taken by @aelkheir. API 7.3 Chat Backgrounds and new params #4247
• Added support for live locations that can be edited indefinitely, allowing 0x7FFFFFFF to be used as live_period. @Bibo-Joshi Api 7.3 docs #4246
• Added the parameter live_period to the method editMessageLiveLocation - Taken by @aelkheir. API 7.3 Chat Backgrounds and new params #4247
• Added the field question_entities to the class Poll - Taken by @aelkheir. Api 7.3 polls #4260
• Added the field text_entities to the class PollOption - Taken by @aelkheir. Api 7.3 polls #4260
• Added the parameters question_parse_mode and question_entities to the method sendPoll - Taken by @aelkheir.
• Added the class InputPollOption and changed the type of the parameter options in the method sendPoll to Array of InputPollOption - Taken by @Bibo-Joshi Api 7.3 InputPollOption #4248
• Added the classes ChatBackground, BackgroundType, BackgroundFill and the field chat_background_set of type ChatBackground to the class Message, describing service messages about background changes - Taken by @aelkheir. API 7.3 Chat Backgrounds and new params #4247
• Split out the class ChatFullInfo from the class Chat and changed the return type of the method getChat to ChatFullInfo - Taken by @harshil21. API 7.3: ChatFullInfo, Readmes #4242
• Added the field max_reaction_count to the class ChatFullInfo - Taken by @harshil21. API 7.3: ChatFullInfo, Readmes #4242
• Documented that .MP3 and .M4A files can be used as voice messages. @Bibo-Joshi Api 7.3 docs #4246

Describe alternatives you've considered

If you want to contribute, you can start from the Contribution Guide.

Additional context

Please comment below before start working on any part of the update to keep things in track and avoid double work.