前置
/scoreboard objectives add 入服提示 dummy
/scoreboard objectives add 入服检测 dummy
指令
1.循环无条件：scoreboard players add @a 入服检测 0
2.连锁无条件：tellraw @a[scores={入服检测=0}] {"rawtext":[{"translate":"%%9","with":{"rawtext":[{"selector":"@s[scores={入服提示=..1}]"},{"selector":"@s[scores={入服提示=..2}]"},{"selector":"@s[scores={入服提示=..3}]"},{"selector":"@s[scores={入服提示=..4}]"},{"selector":"@s[scores={入服提示=..5}]"},{"selector":"@s[scores={入服提示=..6}]"},{"selector":"@s[scores={入服提示=..7}]"},{"selector":"@s[scores={入服提示=..8}]"},{"text":"§e富可敌国的 "},{"text":"§d全服最萌的 "},{"text":"§b全服最帅的 "},{"text":"§4腐竹 "},{"text":"§5在线跑路 "},{"text":"§a托马斯回旋拥有者 "},{"text":"§g原地爆炸 "},{"text":"§c精神抖擞的 "}]}},{"selector":"@a[scores={检测=0}]"},{"text":" 进入了服务器！"}]}
3.连锁无条件：execute as @a at @s run playsound random.orb @s ~ ~ ~ 100 1.5
4.连锁无条件：scoreboard players reset * 入服检测
5.连锁无条件：scoreboard players set @a 入服检测 1

使用
给指定玩家的入服提示计分板设置指定的分数即可